The publishers listed in this section of the 18th edition publish monographs, journals, or series in philosophy and related disciplines. Information provided includes the complete name and address of the publisher, telephone and fax numbers, e-mail address and web site, year established, and titles of series and journals. Because of continuing mergers and consolidation in the publishing industry it is sometimes difficult to identify the actual owner of a given publisher.
A 2013 study studied this question.