Ulrich's Update : Supplement to Ulrich's International Periodicals Directory / Compiled by R.R. Bowker; Sen. Edt.: Edvika Popilskis. - New Providence ; New Jersey : A Reed Reference Publishing Company, 1992. - volum, number. - Three times per year

V. 5 No. 1 (1992, 318 p.) V. 5 No. 2 (1993, 560 p.) V. 5 No. 3 (1993, 914 p.)

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International periodicals directory

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