Tucker, Richard L.2011-04-182011-04-182002-05http://hdl.handle.net/2152/10933textelectronicengCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.Construction industry--United States--EmployeesRestricted