Ringback number (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ringback number" in English language version.

refsWebsite

Global rank English rank

5^th place

5^th place

70^th place

63^rd place

loc.gov (Global: 70^th place; English: 63^rd place)

cdn.loc.gov

50 FR 29391 Federal Register, 50 (139), (19 July 1985). Seen 03 February 2021.

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

Petersen, Julie (2002). The telecommunications illustrated dictionary. Petersen, Julie K. (2nd ed.). Boca Raton, Fla.: CRC Press. p. 804. ISBN 084931173X. OCLC 51169186.