Ibid. "Mr. Sarnoff noted that NBC's parent, RCA, and RCA Victor 'have been closely identified with the Philadelphia-Camden area for many years. It is for this reason that NBC has chosen WRCV and WRCV-TV as the call letters for its Philadelphia stations.'"
"The KYW Story" (talk given September 24, 1975, by Joseph Baudino to the Philadelphia Broadcast Pioneers).
cbslocal.com
philadelphia.cbslocal.com
"The History of KYW Newsradio", which details the evolution of the station from Chicago, to Philadelphia, to Cleveland and back to Philadelphia (philadelphia.cbslocal.com)