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Lydekker R,. (1916). Catalogue of ungulates – Perissodactyla. Catalog of Ungulate Mammals, 5, 1–39.
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Lydekker R,. (1912). The horse and its relatives. London.
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Lydekker R,. (1904). Note on the skull and markings of the Quagga. Proc Zool Soc Lond, , 426–431.
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Lydekker R,. (1904). Note on the wild ass of Mongolia. Proc. Zool. Soc. London., Part 1, 431–432.
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