@book{129647,
	author = {Bergstrom, Stig M. and Ohio State University. Department of Geological Sciences and Congreso Geológico Argentino (13er. : 1996 oct. 13-18 : Buenos Aires) y Congreso de Exploración de hidrocarburos (3er. : 1996 oct. 13-18 : Buenos Aires) and Huff, Warren D. and Ohio State University. Department of Geological Sciences},
	title = {Lower and middle ordovician k-bentonites in the precordillera of Argentina},
	publisher = {Instituto Argentino del Petróleo, IAP}
}