TY - RPRT TI - Principal facts for gravity stations in the Yuma, Arizona and Blythe, California areas AU - Donald L. Peterson AU - Arthur Conradi AU - Adel A. R. Zohdy PY - 1972 DO - 10.3133/70043098 UR - https://pubs.usgs.gov/publication/70043098 ID - 70043098 ER -