TY  - RPRT
TI  - Ionic method of geophysical prospecting
AU  - E.A. Sergeev
AU  - A.P. Solovov
AU  - H. E. Hawkes
PY  - 1937
DO  - 10.3133/ofr4821e
UR  - https://pubs.usgs.gov/publication/ofr4821E
ID  - ofr4821E
ER  -