TY - RPRT TI - Codes for the identification of aquifer names and geologic units in the United States and the Caribbean outlying areas AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1985 DO - 10.3133/cir878c_1985 UR - https://pubs.usgs.gov/publication/cir878C_1985 ID - cir878C_1985 ER -