References
- Jackson , Mary E. 1998 . Measuring the Performance of Interlibrary Loan Operations in North American Research and College Libraries , 21 Washington , DC : Association of Research Libraries .
- Trueswell , Richard L. 1969 . Some behavioral patterns of library users: The 80/20 rule . Wilson Library Bulletin , 43 ( 5 ) : 458 – 461 .
- Ward , Suzanne M. 2002 . Books on demand: Just-in-Time acquisitions . The Acquisitions Librarian , 27 : 95 – 107 .