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Author Title (up) Year Publication Volume Pages
Koivisto, I.; Wahlberg, C.; Muuronnen, P. Breeding the snow leopard (Panthera Uncia) at the Helsinki Zoo 1967-1976 1977 Int.Zoo Yearbook 17 39-44
Koivisto, I. Preface 1978 International Pedigree Book of Snow Leopards, Vol. 3 1 1-2