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2
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Encyclopedia of caves / editors, William B. White, David C. Culver.
- 551.44703 E5636 2012
- Academic Press,
- c2012.
- Waltham, MA :
-
Academic Press dictionary of science and technology / edited by Christopher Morris.
- 503 A1682 1992
- Academic Press,
- c1992.
- San Diego :