1. Information Technology Advisory Panel, Making a Business of Information: A Survey of New Opportunities, HMSO, London, 1983.
2. Basker, J. (Ed.), Are You Commercial? How to Charge for Reference Services: Proceedings of a One Day Seminar (7 February 1991), Library Association Information Services Group, London, 1992.
3. Jones, D. (Ed.), The Impact of Charges in the Public Library Service: Proceedings of a Seminar Organized by the Federation of LocalAuthority ChiefLibrarians (29 March 1988), Library Association, London, 1988.