1. Las Animas Formation (upper Precambrian) in the subsurface of southeastern Colorado Author/Creator: Tweto, Ogden, 1912-1983 Publication/Creation: [Washington, D.C.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1983 Resource Type: Book Access & Availability: Loading
2. The Lawson Creek Formation of Middle Proterozoic age in east-central Idaho Author/Creator: Hobbs, S. W. 1911- (Samuel Warren), author Publication/Creation: [Reston, Va.] : United States Department of the Interior, Geological Survey, 1980 Resource Type: Book Access & Availability: Loading
3. The Lawson Creek Formation of Middle Proterozoic age in east-central Idaho Author/Creator: Hobbs, S. W. 1911- (Samuel Warren) Publication/Creation: Washington : U.S. Govt. Print. Off. : For sale by Supt. of Docs, 1980 Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1478-1482. Access & Availability: Loading
4. Lower Cretaceous Mount Pablo formation, northwestern Montana Author/Creator: Mudge, Melville R., 1921- Publication/Creation: Alexandria, VA : For sale by the Branch of Distribution, U.S. Geological Survey Resource Type: Book Is Part Of: U.S. Geological Survey bulletin, no. 1501-1504. Access & Availability: Loading