United States. Forest Service. Pacific Northwest Region
Date
1986
Edition
Revised in the Geometronics Service Center Office, Salt Lake City, Utah in 1981, additional base revisions have been made in 1982, supplemental recreation data added in 1982.
United States Department of Agriculture, Natural Resources Conservation Service ; in cooperation with United States Department of Agriculture, Forest Service; United States Department of the Interior, Bureau of Land Management; and Oregon Agricultural Experiment Station