Abstracts of North American geology, US Geological Survey 

 - WASHINGTON, d.c. :  US GEOLOGICAL SURVEY, 
 - Mensual 
<br/><br/><label>ISSN: </label>0001-3625 
 = Abstracts of North American geology, US Geological Survey 
 = ABSTR. NORTH AM. GEOL. 
<br/><br/><label>Subjects--Index Terms: </label>GEOLOGIA BIBLIOGRAFIA;  INDICES