Contents 
INTRODUCTION, by D. K. Wetherbee .. 
RECENT FINDINGS IN THE INHIBITION OF 
AVIAN SPERM SUSTENTATION, by Roy D. Crawford . . 
RECENT FINDINGS IN THE INHIBITION OF 
AVIAN OVA SUSTENTATION, by Pedro F. Consuesra .. 
RECENT FINDINGS IN THE INHIBITION OF 
AVIAN EMBRYOGENESIS, by Macreay J. Landy ..... 
RECENT FINDINGS IN THE INHIBITION OF 
' AVIAN OOGENESIS, by Ralph G. Somes, Jr. ..... 
RECENT FINDINGS IN THE INHIBITION OF 
AVIAN SPERMATOGENESIS, by Bernard C. Wentworth . . 
RECENT FINDINGS IN THE INHIBITION OF 
AVIAN EMBRYO SUSTENTATION, by Raymond P. Coppinger 
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