(1976). Interim specifications and methods adopted by the AASHTO subcommittee on materials 1976. Washington, D.C: American Association of State Highway and Transportation Officials.
Παραπομπή Chicago StyleInterim Specifications and Methods Adopted By the AASHTO Subcommittee On Materials 1976. Washington, D.C: American Association of State Highway and Transportation Officials, 1976.
Παραπομπή MLAInterim Specifications and Methods Adopted By the AASHTO Subcommittee On Materials 1976. Washington, D.C: American Association of State Highway and Transportation Officials, 1976.
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