Ulrich's international periodicals directory 1989-90 / R R Bowker Company - 28th ed. - New York: R R Bowker Company, 1989 - 1058p. - A bowker serials bibliography . Vol.1 (A-G)Vol.2 (H-Z with indexes) Subjects--Topical Terms: Information science Subjects--Index Terms: Periodicals Universal Decimal Class. No.: R 05(058.7) / J9;M9.1;1