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| Title | Northern Sump Index 2015 |
| Author | Hill, E & Hall,A |
| Date | 2015 |
| Pages | 386 |
| Publisher | Cave Diving Group |
| Copyright © | Cave Diving Group |
| ISBN | 9780901031082 |
| Subject | Cave diving Britain Dales |
| Number | 1908 |
| Type | Book |