United States. Forest Service. Pacific Northwest Region & Gast, W. R. (1991). Blue Mountains forest health report: New perspectives in forest health. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Forest Service. Pacific Northwest Region and William R. Gast. Blue Mountains Forest Health Report: New Perspectives in Forest Health. [Portland, Or.?] : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Region, Malheur, Umatilla, and the Wallowa-Whitman National Forests: [publisher not identified], 1991.
MLA (9th ed.) CitationUnited States. Forest Service. Pacific Northwest Region and William R. Gast. Blue Mountains Forest Health Report: New Perspectives in Forest Health. [publisher not identified], 1991.
Warning: These citations may not always be 100% accurate.