LITERATURE CITED 



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1923. " The Ancestry of Man." Douglas Price Me- 

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1921. (With George G. Campion.) "A Contribution 

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1923. "The Adaptational Machinery Concerned in 

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Leche, William. 1911. "DerMensch." Jena. 



Le Double, A. F. 1900. "Essai sur la Morphogenie et 

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