Brzezinski, Zbigniev K., author
Frederick A. Praeger, 1962
Buku Teks
Wetter, Gustav Andreas, 1911-, author
Frederick A. Praeger, 1962
Buku Teks
Grachev, Andrei, author
Poloty Press, 2008
Buku Teks
Progress Publisher, 1981
Buku Teks
Barghoorn, Frederick C.
Princeton University Press, 1960
Buku Teks