TY  - RPRT
TI  - Sand and gravel resources of the San Bernardino National Forest, California
AU  - R. C. Greene
AU  - J.P. Calzia
PY  - 1995
DO  - 10.3133/ofr95535
UR  - https://pubs.usgs.gov/publication/ofr95535
ID  - ofr95535
ER  -