Radiant darkness
Subtitle: the wonderful world of caves
By: Alfred Bögli, Herbert W. Franke ; translated by B. M. Charleston, H. Griffin.
Contributors: Franke, Herbert  W.
Publisher: Harrap
Published: 1967
Place of publication: London
Language: eng
Number of pages: 84
Notes: Translation of 'Leuchtende Finsternis' (Kummerly & Frey, 1965).