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USA | |
| Brown, Randall E., 1942, Some Manganese Deposits in the Southern Oregon Coastal Region: Oregon Department of Geology and Mineral Industries Short Paper No. 9, Pages 2-5. |
| Brown, Randall E., 1942, Some Manganese Deposits in the Southern Oregon Coastal Region: Oregon Department of Geology and Mineral Industries Short Paper No. 9, pages 5-6. |
| Brown, Randall E., 1942, Some Manganese Deposits in the Southern Oregon Coastal Region: Oregon Department of Geology and Mineral Industries Short Paper No. 9, page 6. |
| Len Ramp et al (1977) Geology, mineral resources, and rock material of Curry County, Oregon. DOGAMI Bulletin 93 |
| Christopher L. Johnston, Mickey E. Gunter, and Charles R. Knowles (1991) Sunstone Labradorite from the Ponderosa Mine, Oregon. Gems And Gemology Winter 220-233 |
- Butte Creek Mining District
| Oregon Metal Mines Handbook, 1943, Oregon Department of Geology and Mineral Industries: Bulletin No. 14-C, Vol. 2, Section 2 - Jackson Co., page 145. |
- Lake Creek Mining District
| Lowry, Wallace D., 1943, Tyrell Manganes Deposit and other similar properties in the Lake Creek District, Oregon: Oregon Department of Geology and Mineral Industries Short Paper No. 10, pages 4-5. |