Czyt. Czas. 297,618 Ulrich s international periodicals directory : a classified guide to current periodicals, foreign and domestic 1986-1987. - 25 ed. - New York : R.R. Bowker, Division of Reed Publ. USA, /1986/. — 2 vol. - 28 cm (The Bowker International Serials Database, ISSN 0000-0175) ISBN 0-8352-2275-6 (2 vol. set) Vol. 1 : A - M. - XLVII, [1], 1243 s. ISBN 0-8352-2276-4 (vol. 1) Vol. 2 : N — Z with indexes. — XLVII, [1], S. 1246-2272 ISBN 0-8352-2277-2 (vol. 2)