Survey protocol for the great gray owl within the range of the Northwest Forest Plan - Quintana-Coyer, Deborah L.; United States. Forest Service.; United States. Bureau of Land Management. ([Washington, D.C.?], U.S. Dept. of Agriculture, Forest Service, [2004])
https://www.biodiversitylibrary.org/bibliography/110487
Keywords: Forest management|Great gray owl|Habitat surveys|Monitoring|Northwest Forest Plan (U.S.)|Northwest; Pacific|Pacific Northwest|Wildlife monitoring|