TY  - BOOK
AU  - Heirland, Carl August,
TI  - Geophysical exploration
T2  - Prentice hall geology series
AV  - TN269 H4
PY  - 1951///c1940
CY  - New York
PB  - Prentice Hall
KW  - Geofísicos
KW  - Exploracion
ER  -