Acceso al Documento y Empresas de Información Documental: Internacionales
- ADONIS Document Delivery Service and Electronic Journal Subscription Service
- BLDSC The British Library Document Supply Centre
- BL The British Library
- BOWKER-SAUR
- CH Chadwyck-Healey
- DIALOG The Dialog Corporation
- EBSCO Elton B. Stephens Company
- EEMA European Electronic Messaging Association
- ELSEVIER Sciencie
- FIZ Fachinformationszentrum Karlsruhe
- INIST Institut de l'Information Scientifique et Technique du CNRS
- CNRS Centre National de la Recherche Scientifique
- ISI The Institute for Scientific Information
- JISC Joint Information Systems Committee
- LEXIS-NEXIS
- SilverPlatter
- UMI
- Bell & Howell Company