The Longest Cave - Brucker, Roger W, and Watson, Richard A, Professor, PH.D., and Watson, Richard A

In 1925 the geological connection between Flint Ridge and Mammoth Cave was proved when dye placed in a Flint Ridge spring showed up in Echo River at Mammoth Cave. That tantalizing swirl of dye confirmed specula-tions that were""to tempt more than 650""cavers over half a century with the thrill of being the first to make human passage of the cave ... Read More

The Longest Cave 1987, Southern Illinois University Press, Carbondale

ISBN-13: 9780809313228

Trade paperback

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The Longest Cave 1987, Southern Illinois University Press

ISBN-13: 9780809313211

Hardcover

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The Longest Cave 1976, Alfred A. Knopf

ISBN-13: 9780394487939

Unknown binding

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