Coprolites : an annotated bibliography - Hantzschel, Walter; El-Baz, Farouk; Amstutz, G. C. (Gerhardt Christian), 1922- (Boulder, Colorado : Geological Society of America, 1968)
'The present study has grown out of the 1958 paper by G. C. Amstutz on Coprolites: a review of the literature and a study of specimens from southern Washington.'
Keywords: Coprolites -- Bibliography