TY - RPRT TI - Field estimates of gravity terrain corrections and Y2K-compatible method to convert from gravity readings with multiple base stations to tide- and long-term drift-corrected observations AU - Donald Plouff PY - 2000 DO - 10.3133/ofr00140 UR - https://pubs.usgs.gov/publication/ofr00140 ID - ofr00140 ER -