TY  - RPRT
TI  - Preliminary contour map showing elevation of surface of Pleistocene alluvium under Santa Clara Valley, California
AU  - Edward J. Helley
PY  - 1991
DO  - 10.3133/ofr90633
UR  - https://pubs.usgs.gov/publication/ofr90633
ID  - ofr90633
ER  -