TY  - RPRT
TI  - Master curves of Schlumberger soundings over three vertical layers; array expanded at right angles to strike
AU  - Adel A. R. Zohdy
PY  - 1980
DO  - 10.3133/ofr80249
UR  - https://pubs.usgs.gov/publication/ofr80249
ID  - ofr80249
ER  -