TY  - RPRT
TI  - Surface-seismic imaging for nehrp soil profile classifications and earthquake hazards in urban areas
AU  - R. A. Williams
AU  - W. J. Stephenson
AU  - J. K. Odum
PY  - 1998
UR  - https://pubs.usgs.gov/publication/70020255
ID  - 70020255
ER  -