Ulrich's quarterly.
R.R. Bowker Company.
New York : R.R. Bowker,
1977-1985.
Supplement to: Ulrich's international periodicals directory, and: Irregular serials & annuals.
R.R. Bowker Company
Periodicals
Ulrich's international periodicals directory
Irregular serials & annuals
Bowker serials bibliography supplement
Bowker international serials database update