Frank Marion Anderson (1863-1945): Cretaceous deposits at the Pacific Coast, Proc. California Acad Sci (1902) ; Samuel Wendell Williston (1851-1918): Contributions to the Univ. Geological Survey of Kansas 1898 & 1900 ;
draughtsman ->Sydney Prentice ; artist ->Fr. Smith ; lithographer ->Britton ; lithographier Hey ;
paleontological drawing
Langer 1978 #6528 ; Davidson 2008: 126 ;
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