The Caves Beyond The Story of the Floyd Collins' Crystal Cave exploration
Joe Lawrence Jr.
Roger W. Brucker
Zephyrus Press, Inc.
Teaneck, N.J. U.S.A.
1975 unaltered reprint first published in 1955
Large pictorial soft cover. White and orange lettering on spine and front cover. Some black and white photographs, a map and meteorological, geological, medical, supply and other reports. Sponsored trip by the National Speleological Society of cave explorations.