TY - RPRT TI - Quantification of the contribution of nitrogen from septic tanks to ground water in Spanish Springs Valley, Nevada AU - Michael R. Rosen AU - Christian Kropf AU - Karen A. Thomas PY - 2006 DO - 10.3133/sir20065206 UR - https://pubs.usgs.gov/publication/sir20065206 ID - sir20065206 ER -