TY - RPRT TI - Sampling colloids and colloid-associated contaminants in ground water AU - Debera A. Backhus AU - Joseph N. Ryan AU - Daniel M. Groher AU - John K. MacFarlane AU - Philip M. Gschwend PY - 2005 DO - 10.1111/j.1745-6584.1993.tb01849.x UR - https://pubs.usgs.gov/publication/70185434 ID - 70185434 ER -