This directory serves as a comprehensive guide to international periodicals published during the 1990-1991 period. It aims to provide librarians, researchers, and information professionals with an authoritative and up-to-date resource for identifying and accessing serial publications from around the globe. The volume details publication information, editorial content, and subscription details for a vast array of journals, magazines, and newspapers.

As a standard reference work, Ulrich's International Periodicals Directory is expected to be a meticulously compiled and authoritative resource for its intended audience. Its value lies in its comprehensive coverage and the accuracy of the data presented, making it an indispensable tool for library acquisitions and research. The directory's consistent publication history suggests it has been a reliable source for professionals tracking serial publications over many years.