1. Principal unconformities in Triassic and Jurassic rocks, western interior United States : a preliminary survey Author/Creator: Pipiringos, G. N. 1918- (George Nicholas), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1978 Resource Type: Book Access & Availability: Loading
2. Principal unconformities in Triassic and Jurassic rocks, western interior United States : a preliminary survey Author/Creator: Pipiringos, G. N. 1918- (George Nicholas) Publication/Creation: Washington : U.S. Govt. Print. Off, 1978 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 1033-1039. Access & Availability: Loading