1. The conquest of the caves and underground rivers of Czechoslovakia's Macocha abyss
The conquest of the caves and underground rivers of Czechoslovakia's Macocha abyss : a historical and technical study of their exploration / by Karel Absolon. Rockville : Kabel, 1988. xiii, 103 s, [4] s obrazové přílohy. ISBN 0-930329-30-9 :.[1, currently available 1]
II-N39491; 55 (ABS)