Source: Southwestern Telephone News (St. Louis: Southwestern Bell Telephone Co.), 1917-1955 (incomplete run)
Location: St.L. / 05 / So89
Corporate Name:Main Exchange
Building Illustration:Yes
Address:4th & Olive Sts.
Volume:22
Issue:2
Date of Publication:Summer 1935
Page:14
Remarks:historic photograph of main telephone exchange