71. McCarty, K. M., M. Farhoud, J. Ottinger, L. G. Goodrich, and K. L. Bildstein. Spring migration at Hawk Mountain Sanctuary, 1969-1998. Pennsylvania Birds 13:11-15.
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71. McCarty, K. M., M. Farhoud, J. Ottinger, L. G. Goodrich, and K. L. Bildstein. Spring migration at Hawk Mountain Sanctuary, 1969-1998. Pennsylvania Birds 13:11-15.
Download