TY  - RPRT
TI  - Sketches of a hammer-impact, spiked-base, shear-wave source
AU  - W.P. Hasbrouck
PY  - 1983
DO  - 10.3133/ofr83917
UR  - https://pubs.usgs.gov/publication/ofr83917
ID  - ofr83917
ER  -