MA32C Refractories U.S. Census Bureau text Washington, D.C U.S. Dept. of Commerce, Economics and Statistics Administration, Bureau of the Census [1992-1998] monographic U.S. Dept. of Commerce, Economics and Statistics Administration, Bureau of the Census Title from caption of ASCII text file (viewed May 25, 1999) Refractories industry C 3.158/35: C 3.158/35: http://purl.access.gpo.gov/GPO/LPS37872 http://purl.access.gpo.gov/GPO/LPS37872 20160527183804.0 300293