United States. Forest Service. (1992). Lewis and Clark across the Lolo Trail: Clearwater National Forest, Lolo National Forest. [Forest Service, Department of Agriculture].
Chicago Style (17th ed.) CitationUnited States. Forest Service. Lewis and Clark Across the Lolo Trail: Clearwater National Forest, Lolo National Forest. [Washington, D.C.?]: [Forest Service, Department of Agriculture], 1992.
MLA (9th ed.) CitationUnited States. Forest Service. Lewis and Clark Across the Lolo Trail: Clearwater National Forest, Lolo National Forest. [Forest Service, Department of Agriculture], 1992.
Warning: These citations may not always be 100% accurate.