TY - RPRT TI - Principal facts for about 2,800 gravity stations on the Ely 1 by 2 degrees Quadrangle, Nevada and Utah AU - D. A. Ponce PY - 1992 DO - 10.3133/ofr92431b UR - https://pubs.usgs.gov/publication/ofr92431B ID - ofr92431B ER -