Source: The Broadcaster, December 1, 1927, to April 19, 1932 (newsletter published in St. Louis by the Arkansas-Missouri Plant Department, Southwestern Bell Telephone Company)
Location: Frances L. Dewey Papers, Archives
Last Name:Grenninger
First Name:Elwood
Last Name, Alternate Spelling:Greninger
Volume:II
Issue:38
Date of Publication:August 24, 1929
Page:1, 4