Conservation and management of the world's petroglyph sites. 

 - 207 pages :  illustrations ;  24 cm. 
 - World petroglyphs research ;  II. .
 - World petroglyphs research ;  II. .
<br/><br/><label>ISBN: </label>9781565911406  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroglyphs--Conservation and restoration.