Ulrich's international periodicals directory 1986-87 / R R Bowker Company - 25th ed. - New York: R R Bowker Company, 1986 - 1058p. - 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) / J9;M6.1;2