David Robertson interview conducted by Briana M. O'Higgins, 2013-02-04

Chicago Mayor Daley with iron workers Ron Swallow, Richard Frenchy Schon, and Ronnie Duke Price in Chicago in 1968, probably at the base of the Hancock Building. (Photo source: Henry Bud Martens)

Display of varying sizes of reinforcing steel rod material (re-bar), a standard construction material. On display at IWU Local #1, Forest Park, IL.

William Sattler interview conducted by Clark Douglas Halker, 2011-07-27.

Michael Richards interview conducted by Clark Douglas Halker, 2011-08-13.

Unidentified iron workers installing the sound system speakers during the Soldier Field renovation project in 2003. Photo courtesy of Henry Bud Martens

David Monnie Segbee interview conducted by John W. McKerley, 2016-05-09.

IWU Local #1 welding training room with individual stalls. Apprentices in the IWU Local #1 training program learn welding here. IWU Local #1 in Forest Park, IL.

Manual for the normal course in Kansas high schools. 1910-1911.

David Robertson interview conducted by Briana M. O'Higgins, 2013-02-04

Harold Garcia's family photo. He is 9-years-old, in the middle.

Clark Decker and Madeline Robertson Decker interview conducted by Varick Chittenden, 2013-02-04.

Harold Garcia interview conducted by Jaime Lopez, 2017-05-17.

Jeffery Cook interview conducted by Laura Corinne Orleans, 2017-06-08.

Andrew L. Laws interview conducted by Pat Jasper, 2011-09-08.