Mapping underwater caves
By: by Sheck Exley and Bob Friedman.
Contributors: Friedman, Bob.
Publisher: National Association for Cave Diving
Published: 1973
Place of publication: High Springs, FL (P.O. Box 1518, High Springs 32643)
Language: eng
Number of pages: 16
Subjects: Caves -- Maps.; Cave diving.
Notes: Bibliography: p. 15-16.
Imprint stamped on verso of t.p.