TY - RPRT TI - Water resources data for Colorado, water year 1972; Part 2, Water quality records AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1973 DO - 10.3133/wdrco722 UR - https://pubs.usgs.gov/publication/wdrCO722 ID - wdrCO722 ER -