68. Bildstein, K. L. 2001. Raptors as vermin: the history of human attitudes towards Pennsylvania's birds of prey. Endangered Species Update. 18: 124-128. | Hawk Mountain Sanctuary: Learn Visit Join

68. Bildstein, K. L. 2001. Raptors as vermin: the history of human attitudes towards Pennsylvania's birds of prey. Endangered Species Update. 18: 124-128.

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