1. Statistical Bulletin No. 2: Government Statistical Service: January 1993.
2. Sumsion, J and Fossey, D R: LISU Annual Library Statistics 1992: LISU, Department of Information and Library Studies, Loughborough University.
3. Unpublished correspondence from Richard McDaniel, Cornell University, 23 November 1994.
4. Licensed photocopying: user handbook and guidelines for the use of CLARCS: Copyright Licensing Agency: 1993.