TY  - BOOK
AU  - Gomes,J.M.
AU  - Martinez,G.M.
AU  - Wong,M.M.
TI  - Recovery of byproduct heavy minerals from sand and gravel operations in central and southern California
T2  - Report of investigations
PY  - 1980///
CY  - [Washington, D.C.]
PB  - U.S. Bureau of Mines
KW  - Heavy minerals
KW  - By-products
KW  - California
KW  - Sand
KW  - Gravel
ER  -