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| Series | Miscellaneous Map Series | 
| No. | 23-1 | 
| Map Name | Environmental Geologic Map of Northern Part of the Sagami Plain and its Surroundings | 
| Scale | 1:25,000 | 
| Explanatory Text | Explanatory Text of the Environmental Geologic Map of Northern Part of the Sagami Plain and its Surroundings | 
| Author | Akira UNZAWA | 
| Publish Year | 1984 | 
| Publisher | Geological Survey of Japan | 
| Price | ¥3,520 ( Purchase Guide ) | 
| Prefecture | Kanagawa and Tokyo |