TY - RPRT TI - Ambient changes in tracer concentrations from a multilevel monitoring system in Basalt AU - Roy C. Bartholomay AU - Brian V. Twining AU - Peter E. Rose PY - 2013 DO - 10.1111/gwmr.12038 UR - https://pubs.usgs.gov/publication/70094738 ID - 70094738 ER -