Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
G. N. Lance, W. T. Williams. Note on the Classification of Multi-Level Data. Comput. J., 9(4):381-382, 1967. [doi]
Abstract is missing.