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.
Michael Leyton. Principles of information structure common to six levels of the human cognitive system. Inf. Sci., 38(1):1-120, 1986. [doi]
Abstract is missing.