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.
Maria Nowakowska. Semiotic Systems and Knowledge Representation. International Journal of Man-Machine Studies, 13(2):223-257, 1980.
Abstract is missing.