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The sex ratio and multiple births in cattleJohansson, Ivar, January 1900 (has links)
Presented as Thesis (Ph. D.)--University of Wisconsin--Madison, 1930. / Cover title. Reprinted from Zeitschrift für Züchtung. Reihe B Tierzüchtung und Züchtungsbiologie einschliesslich Tierernährung, Band XXIV, Heft 2. Includes bibliographical references (leaves 264-268).
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