This bibliographic guide covers federal-level documents from the legislative, executive, and judicial branches of the Mexican government. It includes bibliographies and catalogs, organization directories, serials and series currently published by government institutions, censuses, annual reports, congressional records, legal materials, and documents shedding light on the workings of agencies. The majority of the titles cited are in Spanish. The guide was compiled at the University of California at Los Angeles (UCLA) and reflects that institution's holdings of Mexican official documents. An introductory essay is also included. (DB)