Departemen Pertambangan dan Energi, 1979
Buku Teks
The National Engineering Consortium
Professional Education International, 1989
eBooks
Hill, Norman L., author
Stanford University Press, 1929
Buku Teks
Dunn, Frederick Sherwood, author
Johns Hopkins Press, 1929
Buku Teks
edited by W.E. Butler
Martinus Nijhoff , 1991
Buku Teks