Standard specifications for transportation materials and methods of sampling and testing part 1: specifications 2
American Association of State Highway and Transportation Officials, 2008
 Buku Referensi
Standard specifications for transportation materials and methods of sampling and testing part 2: specifications 4
American Association of State Highway and Transportation Officials, 2008
 Buku Referensi
Standard specifications for transportation materials and methods of sampling and testing part 1: specifications 1
American Association of State Highway and Transportation Officials, 2008
 Buku Referensi
Standard specifications for transportation materials and methods of sampling and testing part 1: specifications 3
American Association of State Highway and Transportation Officials, 2008
 Buku Referensi
Standard specifications for transportation materials and methods of sampling and testing part 1: specifications 4
American Association of State Highway and Transportation Officials, 2008
 Buku Referensi