McMeen, George H.
American Book Society, 1969
Buku Teks
Dunteman, George Henry
Sage Publications, 1984
Buku Teks
Kerr, George H.
Charles E. Tuttle Company, 1960
Buku Teks
Bevilacqua, Maurizio, author
[Springer-Verlag, ], 2012
eBooks
Mehlenbacher, V.C.
The Garrad Press, 1960
Buku Teks