TY  - BOOK
AU  - Balch, A.H..
TI  - Vertical seismic profiling technique,applications,and case histories / 
SN  - 0-934634-47-5
U1  - H411w 
PY  - 1979///
CY  - Dordrecht : 
PB  - D.Reidel Publishing Company , 
KW  - Earth Science
ER  -