TY - RPRT TI - Potential-field geophysical programs for VAX 7xx computers; source code (programs R-Y) AU - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey PY - 1989 DO - 10.3133/ofr89115d UR - https://pubs.usgs.gov/publication/ofr89115D ID - ofr89115D ER -