The "World's Greatest Newspaper" slogan was first used in a February 1909 feature commemorating the 100th anniversary of Abraham Lincoln's birth, which served as the motto from August 29, 1911, until December 31, 1976 ("'World's Greatest'--1911-1976". Chicago Tribune. Tribune Publishing. June 8, 1997. Retrieved March 26, 2019.).
"W-G-N, Tribune Radio, Starts Tonight', Chicago Daily Tribune, March 29, 1924, pages 1, 11. Zenith had decided to move WJAZ to a suburban transmitter site. It sold the original WJAZ to the Edgewater Beach Hotel management, which changed the call letters to WEBH:
("Alterations and Corrections", Radio Service Bulletin, June 2, 1924, page 7). WEBH was eventually deleted in November 1928 when it was consolidated with KYW ("Strike out all particulars"Radio Service Bulletin, November 30, 1928, page 12.)
"For the Record"(PDF). Broadcasting-Telecasting. Broadcasting Publications, Inc. June 20, 1955. p. 111. Retrieved March 20, 2019 – via World Radio History.
"For the Record"(PDF). Broadcasting-Telecasting. Broadcasting Publications, Inc. July 18, 1955. p. 108. Retrieved March 20, 2019 – via World Radio History.
"For the Record"(PDF). Broadcasting-Telecasting. Broadcasting Publications, Inc. December 16, 1974. p. 48. Retrieved March 20, 2019 – via World Radio History.