id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-10333	Penna, Carlos Victor	Union Catalogs in the Argentine Republic	1947	2	.pdf	application/pdf	1044	50	49	They can be divided into three important groups, each with quite different characteristics: union author catalogs, centralized systematic catalogs, and union catalogs of periodical publications. Union Author Catalogs It is toward this aspect of collaboration among libraries that the most effective ef- forts have been directed, though the type is of less technical complexity than other varieties of union catalogs.	cache/crl-10333.pdf	txt/crl-10333.txt