- Telephone directory (SuDoc PREX 1.22:) by U.S. Postal Service,
- Telephone Helplines Directory by Annabel Barnett, 1997-11
- The International Dialling Code Pages: The Telephone / Fax Dialling Codes by Country and Location by Angus Labunski, 2004-05-30
- The Zip/Area Code Directory 1999 (serial) by Pilot Books, 1999-01
- The 1998 Zip/Area Code Directory: The Quick, Easy Way to Locate Area Codes for All U.S. Postal Zip Codes, Without Operator Assistance (The where to find what you want to know series) by Pilot Books, 1998-02
- The Zip/Area Code Directory 1997 (The Where to Find What You Want to Know Series)
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