Source: Southwestern Telephone News (St. Louis: Southwestern Bell Telephone Co.), 1917-1955 (incomplete run) Location: St.L. / 05 / So89
Last Name:	Bierbaum
First Name:	O.
Middle Name:	H.
Volume:	17
Issue:	11
Date of Publication:	November 1930
Page:	39-40
Remarks:	Listing of years of service