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'25, 2 Thyroid Feeding and Secondary Sex Characters in Rhode Island Red 



Chicks. BIOL. BULL., XLIX., 365. 

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 Torrey, H. B., Riddle, M. C., and Brodie, J. L. 



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 Zavadovsky, 



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 '25, 2 The Effect of Single Doses of Thyroid on Fowls. Ibid., 232. 



