Moore, George William,  1928- <br/><br/>
Speleology :  caves and the cave environment / 
George W. Moore, Nicholas Sullivan ; prepared in cooperation with the National Speleological Society ; illustrated by John C. Schoenherr. 
 - 3rd ed. 
 - St. Louis :  Cave Books,  1997. 
 - xiv, 176 p. :  ill. 
<br/><br/><label>ISBN: </label>0939748460 9780939748464 0939748452 9780939748457 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Speleology.<br/>Espeleología.
<br/><br/><label>Dewey Class. No.: </label>551.44