Langsam, Walter Consuelo
The world since 1919 / Walter Cansuelo Langsam
Macmillan, 1954
Buku Teks
Peck, Ralp B.
Foundation engineering / Ralph B. Peck, Walter E. Hanson , Thomas H. Thornburn
Wiley, 1974
Buku Teks
Climates of northern and eastern Asia
edited by H. Arakawa
Elseveir Pub. Co., 1969
Buku Referensi
Soviet social problems/edited by Anthony Jones, Walter D. Coonnor, David E. Powell
Westview Press, 1991
Buku Teks
Cady, John F.
The roots of French imperialism in Eastern Asia
Cornell University Press, 1954
Buku Teks