1. Morphologic studies of fusulinids from the Lower Permian of West Pakistan, Author/Creator: Douglass, Raymond C. (Raymond Charles) Publication/Creation: Washington : U.S. Govt. Print. Off, 1970 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 642-644. Access & Availability: Loading
2. Morphologic studies of fusulinids from the Lower Permian of West Pakistan Author/Creator: Douglass, Raymond C. (Raymond Charles), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1970 Resource Type: Book Access & Availability: Loading