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Encke, B. (1966). The breeding of snow leopards (Uncia uncia) in the Krefeld Zoo. Freunde des Kolner Zoo, 9(Winter 1966/1967), 145–146.
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National Zoological Park. (1974). Significant birth and hatchings at the National Zoological Park: Studbook for snow leopards (Uncia uncia).
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Mayo, J. G. (1967). Report on the tranquillisation of a male Snow leopard Panthera uncia for semen extraction. International Zoo Yearbook, VII(7), 148–150.
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Portland Zoological Society. (1976). Snow leopards, animals of the month (Vol. 5).
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Ulmer, F. A. (1966). Voices of the Felidae. Stock, , 259–262.
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Clapp, M. Rare cat has back problems. San Antonio News.
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Lindee, S. Snow leopard's back repaired.
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Woodland Park Zoo. (1980). No vacancy.
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Seneca Park Zoo. Meat loan saves leopard.
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Woodland Park Zoo. Snow leopard exhibit plan.
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