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PRINCIPLES OF BIOLOGY— J. 1. Hamaker, Ph.D. 



267 Illustrations. 12n]0, 459 pages. Cloth, $L50 



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COMPARATIVE ANATOMY OF VERTEBRATES— Prof. J. S. Kingsley. 

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MICROBIOLOGY— By Various Authors— Editor, Charles E. Marshall. 



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MAMMALIAN ANATOMY— Alvin Davison, A.M., Ph.D. 



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EMBRYOLOGY— J. P. McMurrich, A.M., Ph.D. 



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