TY - RPRT TI - Plan of study for the regional aquifer systems analysis of the Upper Colorado River Basin in Colorado, Utah, Wyoming, and Arizona AU - O.J. Taylor AU - J. W. Hood AU - E. A. Zimmerman PY - 1983 DO - 10.3133/wri834184 UR - https://pubs.usgs.gov/publication/wri834184 ID - wri834184 ER -