Subterranean wonders : Mammoth Cave, Colossal Cavern, Kentucky.
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Library of Congress Subject Headings
- Mammoth Cave (Ky.)
- Colossal Cavern (Ky.)
- Caves Kentucky.Haskin, Frederic J. (Frederic Jennings), 1872-1944.
- Louisville & Nashville Railroad, Passenger Dept., : [Louisville, Ky.] :
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