id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-11865	Lancaster, F. W.	Evaluation of Systems by Comparison Testing	1966	3	.pdf	application/pdf	1765	62	48	Properly designed, a scheme of alpha- betical subject headings can afford an approach to indexing of aeronautics (or whatever other subject you care to name) equally as concentrated as an approach through a special faceted classification, U niterms, or any other type of index language. If, in the Cran:6.eld investigation, identical entry vocabular- ies for the four systems had been built up, based on the original conceptual analysis of test documents, and if human variables in searching had been elimi- nated, the performance of the systems with respect to retrieval of known rele- vant documents would have been iden- tical.	cache/crl-11865.pdf	txt/crl-11865.txt