Ulrich's International Periodicals Directory 1992-93 : 60th Anniversary. : 3 volume set /
Publisher: R.R. Bowker.
- 31st ed.
- New Providence ; New Jersey : A Reed Reference Publishing Company, 1992.
- The Bowker International Serials Database .
V. 1 (1992, 2520 p.) : V. 2 (1992, 4861 p.) : V. 3 (1992, 6836 p.) :