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USA | |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
- California Mining District (Chiricahua Mining District)
| Mary Luetcke |
| Ref.: Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geol. Sur. Branch Bull. 187, Index of Mining Properties in Cochise Co., AZ: 56 (Table 4) |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| P Cristofono collection, 2007 |
| Luetcke, Rolf (n.d.) Personal communication. |
| P Cristofono collection, 2007 |
- Middle Pass Mining District
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| King, Van (n.d.) Personal communcation. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
- Tombstone Mining District
| Luetcke, Rolf (n.d.) Personal communication. |
- Tombstone Extension Mines
| Luetcke, Rolf (n.d.) Personal communication. |
- Turquoise Mining District (Courtland-Gleeson Mining District)
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Luetcke, Rolf (n.d.) Personal communication. |
| Rolf Luetcke |
Pearce, Pearce Mining District, Pearce Hills, Sulphur Springs Valley, Cochise County, Arizona, USA