id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-13625	Lipetz, Ben-Ami	Information Retrieval Systems: Characteristics, Testing and Evaluation; Information Retrieval, 2d. ed. (Book Review)	1980-11-01	4	.pdf	application/pdf	2320	127	56	He is also very candid, reminding readers repeat- edly that the development and evaluation of information retrieval systems depend on measurements of relevance, a parameter which , in practice , can only be estimated frorri samplings and which is specific to the particular query used in the sampling. For example, there are two widely sepa- rated chapters that discuss the needs of us- ers of information retrieval systems.	cache/crl-13625.pdf	txt/crl-13625.txt