Bibliographic Services is one of the technical Divisions of the National Library of the Philippines which primarily serves to:
* Maintain an up-to-date Philippine National Bibliography and a National Union Catalog Provide on-line periodical indexing of current Filipiniana, foreign serials and special collections with a systematic arrangement;
*Serve as the National Center for International Standard Serial Number (ISSN), International Standard Book Number (ISBN) and International Standard Music Number (ISMN);
*Maintain comprehensive and authoritative national bibliographic record for every item of literature issued in the country according to international standards, and;
*Promote international networking with other countries particularly in the SEA region and provides Inter-Library Loan (ILL) of all library materials at reasonable cost and reasonable time.