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| Series | Geological Sheet Map 1:75,000 |
| No. | 220 |
| Map Name | OKAYAMA |
| Explanatory | Explanatory Text of the Geological Map of Japan, Okayama |
| Author | Tsuyoshi AKAGI |
| Publish Year | 1927 |
| Publisher | Geological Survey of Japan |
| Price | out of stock |
| Prefecture | OKAYAMA |
| Size | @750mm×@520mm |
| Remarks | |