Gurnee guide to American caves : a comprehensive guide to the caves in the United States open to the public /
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| Format: | Book |
| Language: | English |
| Published: |
Teaneck, N.J. :
Zephyrus Press, Inc.,
1980.
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| Physical Description: | viii, 252 páginas : ilustraciones en blanco y negro, mapas en blanco y negro. |
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| ISBN: | 0914264303 |