Landsberg, Hans H., author
The Johns Hopkins Press , 1963
Buku Teks
Dewhurst, J. Frederic
Twentieth Century Fund, 1955
Buku Teks
Dewhurst, J. Frederic, author
Twentieth Century Fund, 1955
Buku Teks
Lincoln, George A., author
Prentice-Hall, 1957
Buku Teks
edited by Margaret R. White
Development of Energy, 1985
Buku Teks