id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
crl-11731	Leffler, William L.	A Statistical Method for Circulation Analysis	1964	3	.pdf	application/pdf	1571	87	75	If we have less copies, the acquisition of additional copies is ration- ally justified, since we expect that we will have occasions when we will not be able to provide a customer with his requested text. Would it not be conveni- ent to look at a chart like this and judge visually the maximum number of copies that were in use?	cache/crl-11731.pdf	txt/crl-11731.txt