TY  - BOOK
AU  - Koefoed, Otto
TI  - Geosounding principles, 1: resistivity sounding measurements 
T2  - Method in geochemistry and geophysics
SN  - 0444417044
U1  - HV 
PY  - 1979///
CY  - New York
PB  - Elsevier Scientific Publishing Company
ER  -