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| Series | Hydrogeological Maps of Japan |
| No. | 31 |
| Map Name | The Chikumagawa and Saigawa Basins, Nagano Prefecture |
| Scale | 1:50,000 |
| Author | TAKAHASHI Shigeru |
| Publish Year | 1981 |
| Publisher | Geological Survey of Japan, AIST |
| Price | ¥1,760 ( Purchase Guide ) |
| Prefecture | |