1. AASHTO is new acronym for AASHO = American Association of State Highway & Transportation Officials.
2. AASHO Road Test (1962), Pavement Research, Report No. 5, Highway Research Board Special Report 61E.
3. AASHTO (1970, 1986), Standard Specifications for Highway Materials and Methods of Sampling and Testing, part 1.
4. AASHTO (1988), Manual on Subsurface Investigations.
5. AASHTO (1987), Maintenance Manual. Amer. Association of State Highway & Transportation Officials, Washington, D.C.