Reference
- Ackerman , Edward A. 1958 . Geography as a Fundamental Research Discipline , Chicago : Department of Geography Research Paper No. 53, University of Chicago Press .
- Bruce , Campbell . 1950–1952 . A Comparison of Bird Populations Upon “Industrial” and “Rural” Farmland in South Wales. . Cardiff Naturalist's Society's Reports and Transactions , 81 : 4 – 65 .
- Darlington , Philip J. Jr. 1957 . Zoogeography: The Geographical Distribution of Animals. , New York : John Wiley & Sons, Inc. .
- Earner , Donald S. 1955 . “ The Annual Stimulus for Migration: Experimental and Physiologic Aspects ” . In Recent Studies in Avian Biology , Edited by: Albert , Wolfson . 198 – 237 . Urbana : The University of Illinois Press . Ch. 7
- Griffin , Donald R. 1955 . “ Bird Navigation ” . In Recent Studies in Avian Biology , Edited by: Albert , Wolfson . 154 – 197 . Urbana : The University of Illinois Press . Ch. 6
- Griffin , D. R. and Hock , R. J. 1949 . Airplane Observations of Homing Birds . Ecology , 30 : 176 – 198 .
- Hesse , Richard , Allee , W. C. and Schmidt , Karl P. 1951 . Ecological Animal Geography (rev. ed.) , New York : John Wiley and Sons, Inc. .
- Kramer , G. 1952 . Experiments on Bird Orientation . Ibis , 94 : 265 – 285 .
- Lowery , George H. and Newman , Robert J. 1955 . “ Direct Studies of Nocturnal Bird Migration ” . In Recent Studies in Avian Biology , Edited by: Albert , Wolfson . 238 – 263 . Urbana : The University of Illinois Press . Ch. 8
- Rabor , D. S. 1959 . The Impact of Deforestation on Birds of Cebu, Philippines, With New Records for that Island . Auk , 76 : 37 – 43 .
- von Saint Paul , Ursula . 1956 . Compass Directional Training of Western Meadowlarks (Sturnella Neglecta) . Auk , 73 : 203 – 210 .
- Welty , C. 1957 . The Geography of Birds . Scientific American , 197 : 118 – 128 .
- Wetmore , Alexander . 1956 . Check-List of the Fossil and Prehistoric Birds of North America and the West Indies. . Smithsonian Miscellaneous Collection , 31 ( 5 )
- Winkenwerder , H. A. 1902 . The Migration of Birds with Special Reference to Nocturnal Flight. , 177 – 263 . Bulletin of the Wisconsin Natural Historical Society no. 2 .
- Wojtusiak , R. J. 1946 . Hypothesis of Sensibility to Infra-red Rays as an Attempt to Explain Some Problems of Animal Orientation . Comptus Rendus Scientific, Natural Academy of Polonaise , : 28 – 29 .
- Yeagley , H. L. 1951 . A Preliminary Study of a Physical Basis of Bird Migration II . Journal of Applied Physics , 22 : 746 – 760 .