TY  - RPRT
TI  - Geologic aspects of tunneling in the Los Angeles area, California
AU  - R. F. Yerkes
AU  - J. C. Tinsley
AU  - Kathleen M. Williams
PY  - 1977
DO  - 10.3133/mf866
UR  - https://pubs.usgs.gov/publication/mf866
ID  - mf866
ER  -