TY  - BOOK
AU  - Shouyue,Zhang
ED  - International Congress of Speleology
ED  - International Union of Speleology
TI  - Proceedings of the XI International Congress of Speleology : August 2 to 8, 1993 Beijing, China
PY  - 1993///
CY  - Beijing
PB  - International Union of Speleology, 
KW  - Speleology
KW  - Congresses
N1  - Includes bibliographical references
ER  -