Abstracts of north American Geology / 
US Departament of the Interior Goelogic.Survey. 
 - Washington :  S. n.,  1966-. 
 - v. :  ill. 
 - Unknown. 
 - Description based :1966- 
 = Abstracts of north American Geology 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science