| Name | Links | |
|---|---|---|
| Library of Congress Name Authority File (LCNAF) "The Library of Congress Name Authority File (NAF) file provides authoritative data for names of persons, organizations, events, places, and titles... | API | |
| Library of Congress Subject Headings (LCSH) "LCSH in this service includes all Library of Congress Subject Headings, free-floating subdivisions (topical and form), Genre/Form headings, Children's (AC) headings, and validation strings for which authority records have been created... | API |