TY  - RPRT
TI  - In-situ seismic wave velocity monitoring
AU  - T.V. McEvilly
AU  - R.W. Clymer
PY  - 1981
DO  - 10.3133/ofr81285
UR  - https://pubs.usgs.gov/publication/ofr81285
ID  - ofr81285
ER  -