Comparative distribution and orientation of North American gulls
Southern, W.E. (1980). Comparative distribution and orientation of North American gulls, in: Burger, J. et al. Marine birds. Behavior of Marine Animals: Current Perspectives in Research, 4: pp. 449-498
In: Winn, H.E.; Olla, B.L. Behavior of Marine Animals: Current Perspectives in Research. Plenum Press: New York, more
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