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Klingel H,. (1969). The social organization and population ecology of the Plains Zebra (Equus quagga). Zoologica Africana, 4, 249–263.
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Klingel H,. (1969). Zur Soziologie der Grevy. Zoolog Anzeiger Suppl, 33, 311–316.
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Klingel H,. (1969). Dauerhafte Sozialverbände beim Bergzebra. Z. Tierpsychol., 26, 965–966.
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Klingel H,. (1970). Grevy. Das Tier, 12, 18–20.
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Klingel H,. (1970). Das Sozialverhalten der Zebras. Sitzungsber Ges Naturforsch Freunde Berlin NF, 10, 77–78.
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Klingel H,. (1972). The Social Behaviour of the African Equidae. Zoologica Africana, 7, 175–185.
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Klingel H,. (1972). Project 496 Somali Wild Ass: Status Survey in the Danakil Region, Ethiopia. World Wildlife Yearbook 1971, , 75–81.
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Klingel H,. (1973). Am Hitzepol der Erde zu Fuß auf Wildesel. Das Tier, 8, 10–15 u. 56.
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Klingel H,. (1974). A comparison of the Social Behaviour of the Equidae. in Geist V & Walther FR (eds): The Behaviour of Ungulates and its Relation to Management. IUCN Publ, , 124–132.
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Klingel H,. (1977). Communication in Perissodactyla. (pp. 715–727,).
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