N. J. Williamson

The Library of Congress Classification and the computer: research in progress

N. J. Williamson, N. Williamson, 1989 .

International trends in subject analysis research

I. C. Mcllwaine, N. J. Williamson, N. Williamson, 1999 .

Subject access in the on-line environment

N. J. Williamson, N. Williamson, 1984 .

Classification in online systems: research and the North American perspective

N. J. Williamson, N. Williamson, 1985 .

The Library of Congress Classification: problems and prospects in online retrieval

N. J. Williamson, N. Williamson, 1986 .