REPRODUCTION AND DEVELOPMENT 



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Romer, A.S. The Vertebrate Body. Saunders, 

 Philadelphia, 1953. 



Shumway, W., and Adamstone, F.B. Introduc- 

 tion to Vertebrate Embryology. Wiley, New 

 York, 1954. 



Spemann, H. Embryonic Development and 

 Induction. Yale Univ. Press, New Haven, 

 1938. 



Waddington, C.H. Principles of Embryology. 



Macmillan, New York, 1956. 

 Willier, B.H., Weiss, P.A., and Hamburger, 



Victor (eds.). Analysis of Development. 



Saunders, Philadelphia, 1955. 

 Witschi, E. Development of Vertebrates. 



Saunders, Philadelphia, 1956. 



