Mid-America Regional Bargaining Association (Builders Association of Greater Chicago, Mason Contractors Association of Greater Chicago, and Lake County Contractors Association) and Construction and General Laborers District Council of Chicago and Vicinity, Laborers International Union of North America (LIUNA), (2001) [PDF]
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Mason Contractors Association of St. Louis and International Union of Bricklayers & Allied Craftworkers (BAC), Local Union No. 1 (2001) [PDF]
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Mason Contractors Association of Massachusetts, Inc. and Bricklayers & Allied Craftsmen Union (BAC), Local 3 (2002) [PDF]
, 2002 core +1 more source
Employing Bricklayers Association of Delaware Valley and International Union of Bricklayers & Allied Craftsmen (BAC), Local 1 (1997) [PDF]
, 1997 core +1 more source
The Mining Industries, 1899-1939: A Study of Output, Employment, and Productivity [PDF]
Harold Barger, Sam H. Schurr
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