| American Concrete Pavement Association | www.pavement.com |
| American Concrete Institute | www.aci-int.org |
| Concrete Masonry & Hardscapes Association | www.masonryandhardscapes.org |
| Indiana Builders Association | www.buildindiana.org |
| Indiana Ready Mixed Concrete Association | www.irmca.com |
| National Ready Mixed Concrete Association | www.nrmca.org |
| Portland Cement Association | www.cement.org |
| National Precast Concrete Association | www.precast.org |
