TY - RPRT TI - Determination of nanogram per liter concentrations of volatile organic compounds in water by capillary gas chromatography and selected ion monitoring mass spectrometry and its use to define groundwater flow directions in Edwards Aquifer, Texas AU - P.M. Buszka AU - D.L. Rose AU - G. B. Ozuna AU - G.E. Groschen PY - 2002 DO - 10.1021/ac00116a008 UR - https://pubs.usgs.gov/publication/70018806 ID - 70018806 ER -