152. Bildstein, K. L. 208. A brief history of raptor conservation in North America. In The State of North America's birds of prey (K. L. Bildstein, J. Smith, and E. Ruelas, eds.). Hawk Mountain Sanctuary, Orwigsburg, PA.
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152. Bildstein, K. L. 208. A brief history of raptor conservation in North America. In The State of North America's birds of prey (K. L. Bildstein, J. Smith, and E. Ruelas, eds.). Hawk Mountain Sanctuary, Orwigsburg, PA.
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