TY  - GEN
AU  - Spradley, Harold L
TI  - Surveying and Navigation for Geophysical Exploraton
SN  - 0934634874
U1  - 526.9 
PY  - 1985///
CY  - Boston
PB  - International Human Resources Development Corporation
KW  - Geophysical Explorations
KW  - Hydrographic Surveys
KW  - Navigation
ER  -