TY - RPRT TI - Geologic framework, structure, and hydrogeologic characteristics of the Knippa Gap area in eastern Uvalde and western Medina Counties, Texas AU - Allan K. Clark AU - Diana E. Pedraza AU - Robert R. Morris PY - 2013 DO - 10.3133/sir20135149 UR - https://pubs.usgs.gov/publication/sir20135149 ID - sir20135149 ER -