Ulrich's international periodicals directory 1992-93: Including irregular serials & annuals / R R Bowker Company - 31st ed. - New York: R R Bowker Company, 1992 - 1058p. - A bowker serials bibliography . Vol.1 (A-H)Vol.2 (I-Z)Vol.3 (Indexes) Subjects--Topical Terms: Information science Subjects--Index Terms: Periodicals Universal Decimal Class. No.: R 05(058.7) / N2.1