Mukerji, K.G., author
Tata McGraw-Hill, 1986
Buku Referensi
Kelly, Mary Ann
Appletton-Century-Croft , 1985
Buku Teks
Wheeler, Margaret
Hart Publishing Company, 1967
Buku Teks
Columbia University Press, 1946
Buku Teks
Lay, M.G
Australian Road Research Board, 1985
Buku Teks