Challenge underground /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
London :
G. Allen & Unwin,
1975.
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| Series: | Speleologia (Zephyrus Press)
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| Subjects: |
| Item Description: | Imprint covered by label which reads : Zephyrus Press, Teaneck [N.J.] Includes index. |
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| Physical Description: | 192 pages, 6 unnumbered leaves of plates : illustrations ; 23 cm. |
| ISBN: | 0914264168 |