TY - RPRT TI - Accuracy testing of steel and electric groundwater-level measuring tapes: Test method and in-service tape accuracy AU - Janice M. Fulford AU - Christopher S. Clayton PY - 2015 DO - 10.3133/ofr20151137 UR - https://pubs.usgs.gov/publication/ofr20151137 ID - ofr20151137 ER -