IndexCat™ is the user interface that provides access to searchable database containing the bibliographic citations of printed series of the Index-Catalogue of the Library of the Surgeon General’s Office. It provides direct access to the NLM online catalog of books, journals, audiovisuals and other materials in the library collections. It reflects the same publishing patterns: series, volumes, references, and the original dictionary arrangement for browsing and display. As a digitized resource, users may search all descriptive information as direct search terms. IndexCat has loads of resources on primary health care.