The Jewel Cave adventure
Subtitle: fifty miles of discovery under South Dakota
By: Herb and Jan Conn.
Contributors: Conn, Jan E., joint author.
Series: Speleologia
Publisher: Zephyrus Press
Published: 1976
Place of publication: Teaneck, N.J
Language: eng
Number of pages: 238
Subjects: Jewel Cave National Monument (S.D.)
Notes: Includes index.