@article{Dilger, author = {Dilger, W. C.}, title = {Changes in Nest-Material Carrying Behavior of F1 Hybrids Between Agapornis roseicollis and A. personate fischeri During Three Years (Abstract)}, series = {Th. E. McGill (Ed.), Readings in Animal Behavior, New York etc. (Holt, Rinehart and Winston) 1965, pp. 532.}, journal = {Th. E. McGill (Ed.), Readings in Animal Behavior, New York etc. (Holt, Rinehart and Winston) 1965, pp. 532.}, language = {en} } @article{Dilger, author = {Dilger, W. C.}, title = {Excerpts From: The Comparative Ethology of the African Parrot Genus Agapornis}, series = {Th. E. McGill (Ed.), Readings in Animal Behavior, New York etc. (Holt, Rinehart and Winston) 1965, pp. 511-531.}, journal = {Th. E. McGill (Ed.), Readings in Animal Behavior, New York etc. (Holt, Rinehart and Winston) 1965, pp. 511-531.}, language = {en} }