-  Concrete Foundations    Association
-  Portland Cement    Association
-  Wall-Ties & Forms,    Inc.
-  Concrete Concepts    Magazine
-  Oklahoma National    Association of    Homebuilders
-  American Concrete    Institute
-  American Concrete    Pumping Association
-  Center for Advanced    Cement Based    Materials
-  Concrete Reinforcing    Steel Institute
-  National Ready Mix    Concrete Association