id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crln-20644	Hawthorn, Margaret; Goettler, Elaine	Proportionate probability sampling	1993	3	.pdf	application/pdf	1653	64	62	Using a chi-square analysis, w e found that reported use of and n ee d for journals differed significantly, with almost 100% o f science students answering that journals w ere “very im portant” in a num ber of categories. To differentiate betw een nonusers w ho judged that they did not need the library and students w ho h ad found it unsatisfactory at some point and no longer used it for their li­ brary needs • To obtain a statistically valid survey of student library needs by major area of study to make sure w e w ere providing essential library resources in every case.	cache/crln-20644.pdf	txt/crln-20644.txt