TY - RPRT TI - Perchlorate data for streams and groundwater in selected areas of the United States, 2004 AU - Stephen J. Kalkhoff AU - Sarah J. Stetson AU - Kris D. Lund AU - Richard B. Wanty AU - Gregory L. Linder PY - 2010 DO - 10.3133/ds495 UR - https://pubs.usgs.gov/publication/ds495 ID - ds495 ER -