Luminous darkness
Subtitle: the wonderful world of caves
By: [by] Alfred Bögli [and] Herbert W. Franke. [Translated by B.M. Charleston and H. Griffin]
Contributors: Franke, Herbert W., 1927- joint author.
Publisher: Distributed by Rand McNally
Published: 1967
Place of publication: Chicago
Language: eng
Number of pages: 83
Subjects: Speleology.; Caves -- Pictorial works.
Genres: Pictorial works.
Notes: Translation of Leuchtende Finsternis.