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Aspinall, J. (1979). New enclosures at Howletts and Port Lympne (Vol. 2).
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Aspinall, J. (1978). Some aspects of breeding tigers and other big cats. Friends of Howletts and Port Lympne, 1(Spring), 26–32.
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Marma, B. B., Yunchis, V.V. (1969). Biology of the snow leopard (Panthera uncia uncia). Zoologicheskii Zhurnal, 47(11), 1689–1694.
Abstract: The methods to obtain progeny of the snow-leopard (Panthera uncia uncia) in captivity were being elaborated in the zoological garden of Kaunas, Lithuanian SSR. The blood characteristics for snow-leopards is given and compared to that for African lions and Sumatran tigers. A series of internal, external and clinical indices is established. The rut lasts for 5-7 day, the duration of pregnancy equals 98 days. The duration of lactation varies from 3 to 4 months. Sexual maturity is attained on the 3rd-4th year. From 1960 to 1967 in zoological ghardens of the world abuot 29 snow-leopards were born. 14 of them -- in the Kauna zoological garden.
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Hemmer, H. Studies of Irbis, Uncia uncia: Munich State-collection Zoo.
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Houston Zoological Society. (1979). Houston's summer snow.
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Krumbiegel, V. I. (1936). Die schneeleoparden (Felis uncia Schreb.) des Dresdner Zoologischen Gartens. Dresdner Zoologischen Gartens, , 34–37.
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Bangjie, T., & Yanfa, L. (1988). The Status of Captive Snow Leopards in China. In H.Freeman (Ed.), (pp. 151–166). India: International Snow Leopard Trust and Wildlife Institute of India.
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Seneca Park Zoo. Meat loan saves leopard.
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Woodland Park Zoo. (1980). No vacancy.
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Lindee, S. Snow leopard's back repaired.
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