TY - RPRT TI - Water resources data for Colorado, water year 1971; Part 1, Surface water records AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1972 DO - 10.3133/wdrco711 UR - https://pubs.usgs.gov/publication/wdrCO711 ID - wdrCO711 ER -