Lyon, Ben <br/><br/>
Venturing underground  the new speleo's guide 
Ben Lyon 
 - East Ardsley  EP Publishing  1983 
 - 160 p. :b ill.  25 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Caving--Amateurs' manuals
<br/><br/><label>Dewey Class. No.: </label>796.5  / 25