| asphalttechnology.org | Association of Asphalt Paving Technologists |
| asphaltinstitute.org | The Asphalt Institute |
| buildingweb.com | Buildingweb.com - Business Management Solutions |
| bca.org.uk | British Cement Association |
| aisc.org | American Institute of Steel Construction (AISC) |
| aci-int.org | The American Concrete Institute (ACI) |
| asphaltwv.com | Asphalt Pavement Association of West Virginia |
| asphaltisbest.com | Minnesota Asphalt Pavement Association - MAPA |
| asphalt.org | International Society for Asphalt Pavements |
| artba.org | American Road and Transportation Builders Association - ARTBA |
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