Unified directory of area codes & zip codes
Subtitle: including Canadian area codes, with population figures for all major US & Canadian cities.
Publisher: Unified Directories
Published: 1982
Place of publication: New York
Language: eng
Number of pages: 181
Subjects: Telephone -- United States -- Area codes -- Directories; Zip codes -- United States -- Directories; Telephone -- Canada -- Area codes -- Directories; United States -- Population -- Statistics; Canada -- Population -- Statistics