| Postal stationery | Stamped envelopes | USSR | 1966 | |
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Askania-Nova Zoo. Wisent-Bison Hybrids. 1966 | |
№ 4424 Stamp: 4 kop. (inland rate), ultramarine. Illustration: Wisent-Bison Hybrids. Inscriptions on Russian and Ukrainian: Askania-Nova Zoo of the Ukrainian scientific research institute of animal industries of steppe areas him. M.F.Ivanov. Size: 162*114 mm | |
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| Wisent-Bison Hybrids are interspecies hybrids of Wisent (Bison bonasus) with Bison (Bison bison). For the first time has been obtained in 1907 in Russia (in Askania-Nova), by crossing Bison cow and Wisent bull. Backcrossing was successfully produced later. | |
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