TY  - RPRT
TI  - A test of a mechanical multi-impact shear-wave seismic source
AU  - David M. Worley
AU  - Jack K. Odum
AU  - Robert A. Williams
AU  - William J. Stephenson
PY  - 2001
DO  - 10.3133/ofr01440
UR  - https://pubs.usgs.gov/publication/ofr01440
ID  - ofr01440
ER  -