TY - RPRT TI - Operations manual for the conversion and validation of unit-values site-index data for the Master Water Data Index of the National Water Information System of the U.S. Geological Survey AU - Scott H. Beddingfield PY - 1988 DO - 10.3133/ofr88180 UR - https://pubs.usgs.gov/publication/ofr88180 ID - ofr88180 ER -