Proceedings of the XI International Congress of Speleology : August 2 to 8, 1993 Beijing, China / 
Edt. Zhang Shouyue. 
 - Beijing :  International Union of Speleology,   1993. 
 - VIII, 250 p. :   ill. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Speleology--Congresses