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Bell, R. H. V. (1971). A grazing ecosystem in the Serengeti. Sci Am, 225(1), 86–93.
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Briand Petersen, J. C., & Casebeer, R. L. (1971). A bibliography relating to the ecology and energetics of East African large mammals. E. Afr. Wildl. J., 9, 1–23.
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Feist, J. D. (1971). Behavior of feral horses in the Pryor Mountain Wild Horse Range. Master's thesis, , University of Michigan.
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Trivers, R. L. (1971). The evolution of reciprocal altruism. Quart Rev Biol, 46(1), 35–57.
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Vaerman, J. P., Querinjean, P., & Heremans, J. F. (1971). Studies on the IgA System of the Horse. Immunol., (21), 443.
Abstract: Equine serum and secretions were found to contain a protein which
cross-reacted with an antiserum against human IgA, but not with antisera against
any other human immunoglobulin. The physicochemical properties of equint
IgA resembled those of human IgA. IgA was found to be the immunoglobulin
having the highest secretion vs serum concentration ratio in equine lacteal and salivary
secretions, and to be the protein produced by the majority of immunoglobulin-
containing cells in the lamina propria of the equine intestine.
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Houpt, T. R., & Houpt, K. A. (1971). Nitrogen conservation by ponies fed a low -protein ration. Am J Vet Res, 32(4), 579–588.
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Altmann, H. J., & Weik, H. (1971). [Serum fatty acid patterns of phospholipid fractions in horses]. Z Tierphysiol Tierernahr Futtermittelkd, 28(5), 285–288.
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Weik, H., & Altmann, H. J. (1971). [Behavior of blood lipids during fasting in the horse]. Zentralbl Veterinarmed A, 18(2), 131–138.
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Epstein H,. (1971). Descent and origin of the ass. (pp. 394–398).
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Epstein H,. (1971). Wild Ass. In Epstein: The origin of the domestic animals of Africa. II, , 378–381.
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