TY - RPRT TI - Water resources data Maryland and Delaware, water year 1972, Part 1. Surface water records AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1973 DO - 10.3133/wdrmdde721 UR - https://pubs.usgs.gov/publication/wdrMDDE721 ID - wdrMDDE721 ER -