id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crln-16760	Roberts, Joni R.; Drost, Carol A.	Internet Reviews	2017-09-07	2	.pdf	application/pdf	1221	69	56	466 select data sets by using a combination of four filters (geographic level, year, topic, or data source) to locate their desired data. Among the most valuable data available through NHGIS are pre-1970 census data, which were digitized and compiled from print sources.	cache/crln-16760.pdf	txt/crln-16760.txt