^T. J. Cade, J. H. Enderson, C. G. Thelander & C. M. White (Eds): Peregrine Falcon Populations – Their management and recovery. The Peregrine Fund, Boise, Idaho, 1988. ISBN 0-9619839-0-6
^Henny, Charles; Nelson, Morlan W. Decline and Present Status of Breeding Peregrine Falcons in Oregon. The Murrelet. 1981, 62 (2): 43–53. JSTOR 3534174. doi:10.2307/3534174. The records of Richard M. Bond and William E. Griffee, and the recollections of Larry L. Schramm and Merlin A. McColm were critical in putting the Peregrine back off the endangered list