vol.
Conţine: The Ring : international ornithological bulletin [hârtie], Index
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 26, 1961, 24 pag.
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 27-28, 1961, pag. 25-58
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 29, 1961, pag. 59-82
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 30-31, 1962, pag. 83-122
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 32, 1962, pag. 123-146
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 33, 1962, pag. 147-170
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 34, 1963, pag. 171-194
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 35, 1963, pag. 195-218
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 36, 1963, pag. 219-242
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 37, 1963, pag. 243-266
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 38, 1964, pag. 1-24
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 39, 1964, pag. 25-48
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 40, 1964, pag. 49-72
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 41, 1964, pag. 73-96
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 42, 1965, pag. 97-120
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 43, 1965, pag. 121-144
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 44-45, 1965, pag. 145-176
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 46-47, 1966, pag. 177-222
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 49, 1966, pag. 251-282
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 50-51, 1967, pag. 1-34
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 52-53, 1967, pag. 35-82
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 54, 1968, pag. 83-110
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 55, 1968, pag. 111-134
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 56, 1968, pag. 135-158
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 57, 1968, pag. 159-186
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 58, 1969, pag. 187-210
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 59, 1969, pag. 211-234
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 60, 1969, pag. 235-258
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 61, 1969, pag. 259-282
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 62, 1970, pag. 1-24
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 63, 1970, pag. 25-52
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 64-65, 1970, pag. 53-100
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 66, 1971, pag. 101-124
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 67, 1971, pag. 125-148
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 68-69, 1971, pag. 149-196
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 70, 1972, pag. 197-222
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 74, 1973, pag. 1-32
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 75, 1973, pag. 33-56
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 76, 1973, pag. 57-82
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 77, 1973, pag. 83-106
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 78, 1974, pag. 107-130
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 79, 1974, pag. 131-154
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 80, 1974, pag. 155-178
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 81, 1974, pag. 179-206
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 82, 1975, pag. 197-222
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 83, 1975, pag. 223-246
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 84-85, 1975, pag. 249-296
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 86-87, 1976, pag. 1-44
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 88, 1976, pag. 45-68
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 89, 1976, pag. 69-90
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 90-91, 1977, pag. 91-132
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 92, 1977, pag. 133-160
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 93, 1977, pag. 161-184
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 94-95, 1978, pag. 185-210
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 96-97, 1978, pag. 211-278
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 98-99, 1979, pag. 1-28
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 100, 1979, pag. 29-86
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 101, 1979, pag. 87-111
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 102-103, 1980, pag. 112-148
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 104-105, 1980, pag. 149-193
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 108-109, 1981, pag. 231-274
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 106-107, 1981, pag. 195-230
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 110-111, 1982, pag. 1-40
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 112-113, 1982, pag. 41-76
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 114-115, 1983, pag. 77-124
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 116, 1983, pag. 125-164
Conţine: The Ring : international ornithological bulletin [hârtie]. vol. 71-73, Index ornithologorum, 1972, pag. 1-112