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Hildebrand M,. (1960). How animals run. Scientific American, 202.
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Walton A,. (1960). Copulation and natural insemination..
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Zeeb K,. (1960). Ethologische und morphologische Betrachtungen am Pferd und deren Bedeutung für praktische Belange. Opel – Jahrb, 59/60.
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Schelling, T. (1960). The Strategy of Conflict.
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Pimlott, D. H. (1960). The use of tape-recorded wolf howls to locate timber wolves. Toronto: Twenty-second Midwest Wildlife Congress.
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