160. Smith, J. P., C. J. Farmer, S. W. Hoffman, G. S. Keltenecker, K. Z. Woodruff, and P. F. Sherrington. 2008. Trends in autumn counts of migratory raptors in western North America, 1983-2005. In The State of North America's birds of prey (K. L. Bildstein, J. Smith, and E. Ruelas, eds.). Series in Ornithology No. 3, Nuttall Ornithological Club and American Ornithologists' Union, Washington, D. C. | Hawk Mountain Sanctuary: Learn Visit Join

160. Smith, J. P., C. J. Farmer, S. W. Hoffman, G. S. Keltenecker, K. Z. Woodruff, and P. F. Sherrington. 2008. Trends in autumn counts of migratory raptors in western North America, 1983-2005. In The State of North America's birds of prey (K. L. Bildstein, J. Smith, and E. Ruelas, eds.). Series in Ornithology No. 3, Nuttall Ornithological Club and American Ornithologists' Union, Washington, D. C.

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