TY  - BOOK
AU  - Spradley, L. Harold
TI  - Surveying and navigation for geophysical exploration
U1  - 622.15 
PY  - 1994///
CY  - Boston
PB  - International Human Resources Development Corporation
KW  - PROSPECTING- GEOPHYSICAL METHODS
KW  - Navigation- geophysical exploration
ER  -