Geology and mineral resource of north central of Chihuahua 
Guidebook for the 1983 Field Conference, October 7-9, 1983 
 - xiv, 454 p.  il.  28 cm. 
 - El Paso Geological Society  15 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geología--Chihuahua (México)
<br/><br/><label>Dewey Class. No.: </label>557.216  / GUI 1983