Radiant darkness
Subtitle: the wonderful world of caves
By: [by] Alfred Bögli [and] Herbert W. Franke; translated [from the German] by B. M. Charleston [and] H. Griffin.
Contributors: Franke, Herbert W., 1927- joint author.
Publisher: Harrap
Published: 1967
Place of publication: London; Toronto [etc.]
Language: eng
Number of pages: 84
Subjects: Speleology.
Notes: Originally published as Leuchtende Finsternis. Berne, Kummerly & Frey, 1965.