RIO annually indexes more than 12,000 articles in and related to the field of religion from 575 fully and selectively indexed journals and 100 scanned journals.
Bibliographic access is available by subject heading, author-editor name, and scripture citation.
Abstracts are included for 1975-1985. RIO subscribers receive a semiannual perfect-bound installment in November that includes indexing through the first half of that year. Each spring subscribers are sent a hardbound cumulation of the past year's listings in a handsome casebound volume. RIT annually indexes more than 8,000 essays in and related to the field of religion from more than 500 books, international in scope. It covers multi-author books that are primarily scholarly in nature, including Festschriften, conference proceedings, and congresses.