TY - RPRT TI - Index of surface-water records, part 9, Colorado River basin, to September 30, 1948 AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1949 DO - 10.3133/cir45 UR - https://pubs.usgs.gov/publication/cir45 ID - cir45 ER -