TY - RPRT TI - Geologic framework and hydrostratigraphy of the Edwards and Trinity aquifers within Hays County, Texas AU - Allan K. Clark AU - Diana E. Pedraza AU - Robert R. Morris PY - 2018 DO - 10.3133/sim3418 UR - https://pubs.usgs.gov/publication/sim3418 ID - sim3418 ER -