United States. Federal Highway Administration. Region 10. Office of Federal Highway Projects & Richardson, E. S. (1977). The investigation of present aggregate gradation control practices and the development of short-cut or alternative test methods. Dept. of Transportation, Federal Highway Administration, Offices of Research and Development.
Chicago Style (17th ed.) CitationUnited States. Federal Highway Administration. Region 10. Office of Federal Highway Projects and E. S. Richardson. The Investigation of Present Aggregate Gradation Control Practices and the Development of Short-cut or Alternative Test Methods. Washington: Dept. of Transportation, Federal Highway Administration, Offices of Research and Development, 1977.
MLA (9th ed.) CitationUnited States. Federal Highway Administration. Region 10. Office of Federal Highway Projects and E. S. Richardson. The Investigation of Present Aggregate Gradation Control Practices and the Development of Short-cut or Alternative Test Methods. Dept. of Transportation, Federal Highway Administration, Offices of Research and Development, 1977.