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Citations
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(1978). Rare Animals and their Protection in the USSR.
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Bekenov A.B. (2002). About the IUCN categories and criteria for animals inclusion in Red Data Books and lists (project INTAS 99-1483).
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Persianova L.A. (1980). About the Red Book listing rare and endangered animal and plant species.
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Prokopov K.P. (2003). The Red Data Book of vertebrate animals in eastern Kazakhstan.
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