Line, Maurice B. and others. National Interlending Systems: A Comparative Study of Existing Systems and Possible Models. Paris: Unesco, 1980 (PGI/78/WS/24 Rev.), p. 122-124.
2.
Buckland, M.K. "The Quantitative Evaluation of Regional Union Catalogues". Journal of Documentation, 23 (1): 20-27(1967).
3.
Vickers, Stephen C. J. and Maurice B. Line .Guidelines for National Planning for the Availability of Publications. Wetherby: IFLA International Office for UAP, 1983, p. 2.
4.
Line, M.B. "Universal Availability of Publications and Developing Countries". In Vervliet, H. D. L., ed. Resource Sharing of Libraries in Developing Countries. Proceedings of the 1977 IFLA/Unesco Pre-Session Seminar for Librarians from Developing Countries. Antwerp University, August 30-September 4, 1977. Munich: Saur, 1978 (IFLA Publications 14), p. 166.
5.
Arms, W.Y. "Duplication in Union Catalogues". Journal of Documentation29 (4): 373-379 (1973).
6.
Ibid. p. 378.
7.
Aschenborn, Hans J. "The SA UNICAT: South Africa's Union Catalogue of Monographs on Microfiche". ISBN Review (1): 40-42 (1977).
8.
Russon, D. "Union Catalogucs at the British Library Lending Division". Interlending Review, 1980, 8(1): 5( 1980).
