Brick Industry Association:

Canadian Masonry Research Institute:

Canada Masonry Centre:

Canadian Standards Association:

Cement & Concrete Association of Australia:

Cement Association of Canada:

Construction Employers Coordinating Council of Ontario:

Council of Ontario Construction Associations:

Council for Masonry Research:

Expanded Shale, Clay and Slate Institute:

Indiana Limestone Institute of America, Inc.:

International Masonry Institute:

Masonry Canada:

Mason Contractors Association of America:

Masonry Institute of Washington:

McMaster University Civil Engineering Department:

National Concrete Masonry Association:

National Lime Association:

National Research Council of Canada:

Ontario Concrete Block Association:

Ontario Construction Secretariat:

Portland Cement Association:

The Masonry Society:

Workplace Safety and Insurance Board: