Kerlinger, Paul. Flight Strategies of Migrating Hawks. Chicago: University of Chicago, 1989. Print.
Paperback. 375 pages. Text unmarked.
Heintzelman, Donald S. A Guide to Hawk Watching in North America. University Park: Pennsylvania State UP, 1985. Print.
Paperback. 3rd printing. 284 pages. Mild corner wear.
Birds of Prey: Their Biology and Ecology by Leslie Brown, hardcover
Bird of Jove: The True Story of One Man's Training of a Berkut Golden Eagle, Imperial Bird of Prey by David Bruce. Paperback, 288 pages. Illustrated with black and white photos.