1Littman J, Connaway L S. A Circulation Analysis of Print Books and E -book in an Academic Research Library[ J]. Library Resources Techinal Services ,2004,48 (4) :256-262.
2Knievel J E, Wicht H, Connaway L S. Use of Circula- tion Statistics and Interlibrary Loan Data in Collection Manage- ment [ J ]. College and Research Libraries, 2006,67 ( 1 ) : 35-49.
3Ochola J N. Use of circulation statistics and interlibrary loan collection management [ J ]. Collection Management, 2002, 27(1) :1.