TY  - BOOK
T1  - A portable vacuum hammer seismic source for use in tunnel environments
DA  - 1993.
CY  - Denver, Colo. :
AU  - Carroll, R. D.
AU  - Magner, J. E.
VL  - 93-187
CN  - I 19.76:
PB  - U.S. Dept. of the Interior, Geological Survey :
PB  - Books and Open-File Reports Section, Branch of Distribution,
PP  - Denver, Colo. :
PY  - 1993.
N1  - Distributed to depository libraries in microfiche.
N1  - Shipping list no.: 94-0205-M.
ID  - 198503
KW  - Seismic refraction method.
KW  - Seismic reflection method.
TI  - A portable vacuum hammer seismic source for use in tunnel environments
ER  -