National Research Council (U.S.). Transportation Research Board, American Association of State Highway and Transportation Officials, United States. Federal Highway Administration, National Cooperative Highway Research Program, & McGrath, T. J. (2002). Recommended specifications for large-span culverts. National Academy Press.

National Research Council (U.S.). Transportation Research Board, American Association of State Highway and Transportation Officials, United States. Federal Highway Administration, National Cooperative Highway Research Program, and T. J. McGrath. Recommended Specifications for Large-span Culverts. Washington, D.C: National Academy Press, 2002.

National Research Council (U.S.). Transportation Research Board, et al. Recommended Specifications for Large-span Culverts. National Academy Press, 2002.