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LOSSES FROM OBSCURE CAUSES on certain California turkey ranges, where green feed is limited during much of the growing season, suggested the need for studies on vitamin-A deficiency in turkeys. The experiments reported herein were outlined to determine the possible relation of A-avitaminosis 4 to turkey mortality and to obtain information concerning the effect on turkeys of various vitamin-A levels.
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Hinshaw et al. (1934) studied this question.
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