TY - RPRT TI - Establishment of sentinel sampling sites to monitor changes in water and sediment quality and biota related to visitor use at Lake Powell, Arizona and Utah, 2004-2006 AU - Robert J. Hart AU - Howard E. Taylor AU - G.M. Anderson PY - 2012 DO - 10.3133/ofr20121237 UR - https://pubs.usgs.gov/publication/ofr20121237 ID - ofr20121237 ER -