TY  - BOOK
AU  - Trask,Parker D.
ED  - California.
TI  - Geologic description of the managanese deposits of California,
T2  - California.  Dept. of Natural Resources.  Division of Mines.  Bulletin,
AV  - TN24.C2 A3 no. 152
U1  - 553.46 
PY  - 1950///
CY  - San Francisco
KW  - Manganese ores
KW  - California
N1  - Part of illustrative matter in pocket; "Supplements Bulletin 125 [prepared under the direction of Olaf P. Jenkins]"
ER  -