750 REPRODUCTION AND MIGRATION IN BIRDS 



. 1942. Regulation of spring migration in juncos. Condor, 44, 237-63. 



. 1945. The role of the pituitary, fat deposition, and body weight in 



bird migration. Condor, 47, 95-127. 



1952a. Day length, migration, and breeding cycles in birds. Sci. 



Monthly, 74, 191-200. 



-. 1952b. The occurrence and regulation of the refractory period in the 



gonadal and fat cycles of the junco. /. Exptl. Zool., 121, 311-26. 



1953. Gonadal and fat response to a 5:1 ratio of light to darkness in 



the white-throated sparrow. Condor, 55, 187-92. 



1954. Production of repeated gonadal, fat, and molt cycles within one 



year in the junco and white-crowned sparrow by manipulation of day length. 

 /. Exptl. Zool, 125, 353-76. 



