TY  - BOOK
AU  - Beckmann,Heinz
TI  - Geological prospecting of petroleum
T2  - NAT flexibook
SN  - 0273004468 :
U1  - 553.2808 
PY  - 1976///
CY  - London
PB  - Pitman
KW  - Petroleum
KW  - Geology
KW  - Prospecting
KW  - Oil well logging
N1  - Bibliography: p. [167]-174. and index
ER  -