TY - RPRT TI - Quality of surface-water runoff in selected streams in the San Antonio segment of the Edwards aquifer recharge zone, Bexar County, Texas, 1997-2012 AU - Stephen P. Opsahl PY - 2012 DO - 10.3133/ds740 UR - https://pubs.usgs.gov/publication/ds740 ID - ds740 ER -