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How local calling areas are determined
Colorado Public Utilities Commission.
2013
Colorado Public Utilities Commission, Consumer Affairs
Denver, Colo.
"2/13"--Page 3. Online resource; title from PDF caption (viewed November 2016)
Public utilities--Law and legislation Telephone
Colorado
1 online (3 pages)
eng
For your information (Colorado Public Utilities Commission)
REG7.2/T23/1/2013/INTERNET
http://hdl.handle.net/11629/co:24618
962330006
2019-07-15T16:50:45.107Z