TY  - RPRT
TI  - Preliminary geologic map of the Laredo, Crystal City–Eagle Pass, San Antonio, and Del Rio 1° x 2° quadrangles, Texas, and the Nuevo Laredo, Ciudad Acuña, Piedras Negras, and Nueva Rosita 1° x 2° quadrangles, Mexico
AU  - William R. Page
AU  - Margaret E. Berry
AU  - D. Paco VanSistine
AU  - Scott R. Snyders
PY  - 2009
DO  - 10.3133/ofr20091015
UR  - https://pubs.usgs.gov/publication/ofr20091015
ID  - ofr20091015
ER  -