KING, R.E. ET AL. - Geology and paleontology of the Permian area northwest of Las Delicias, southwestern Coahuila, Mexico.

1944, Geological Society of America Special Paper 52; 172 pp. 29 fig. 3 fold. plts. 5 photoplts, 37 plts. w. fossils (microfossils, brachiopods, cephalopods). Orig. wrps. libr. stamp.