Pyrolusite from Little Maria Mountains, Riverside County, California, USA
USA | |
| CDMG OFR 94-11 " Mineral Land Classification of the Eastern Half of Riverside Co. CA" |
(2005) Mineral Resources Data System (MRDS), US Geological Survey. | |
CDMG OFR 94-11 " Mineral Land Classification of the Eastern Half of Riverside Co. CA" |