00773nam a22002411 4500 gs 48000102 DLC 20260227111354.0 901115s1946 mx ab b 00000 spa c gs 48000102 //r90 U.S. Geol. Survey Libr./ICU ICU n-mx--- QE203.O2 B3 557.2 Barrera, Tomás, 1895- Guía geológica de Oaxaca. México, 1946. 101 p. illus., 5 maps (in separate pocket) diagrs. 23 cm. At head of title: Universidad Nacional Autónoma de México. Instituto de Geología. Part of the illustrative matter is folded. Bibliographical foot-notes. Geology Mexico Oaxaca. 28271 28271