Ulrich's international periodicals directory / R R Bowker Company - 23rd ed. - New York: R R Bowker Company, 1984 - 118p. - A bowker serials bibliography . Vol.1 (A-M)Vol.2 (N-Z with indexes) Subjects--Topical Terms: Information science Subjects--Index Terms: Periodicals Universal Decimal Class. No.: R 05(058.7) / M4.1