374 References 



Wright, S. 1949. Adaptation and selection, in Jepsen, et al., 1949:365- 

 389. 



Yang, T. W., and C. H. Lowe, Jr. 1956. Correlation of major vegetation 

 climaxes with soil characteristics in the Sonoran desert. Science 123: 

 542. 



Yount, J. L. 1956. Factors that control species numbers in Silver Springs, 

 Florida. Limnol. and Oceanogr. 1:286-295. 



Zinder, N. D. 1953. Infective heredity in bacteria. Cold Spring Harbor 

 Symposia Quant. Biol. 18:261-269. 



