I did a quick review of how many open access journals are covered in the Wilson database, Library Literature and Information Science Index (Library Lit). For the list of open access journals in library and information science, I relied on a subject list in the Directory of Open Access Journals (DOAJ). I then looked Wilson’s list of journals covered, which conveniently enough offered a field of data for each journal on whether it was open access. Here are the numbers:
Number of all journals in Library Lit.: 417
Number of open access journals in Library Lit.: 30
Number of open access journals in LIS in the DOAJ: 87
It is worth noting that the list of open access journals indexed in Library Lit. includes 13 titles that are not on the DOAJ list of LIS journals.
Von 417 Zeitschriften sind also nur ca. 100 Open Access (bzw. kostenfrei zugänglich).