Buttinger, Joseph
Frederick A. Praeger, 1968
Buku Teks
Trager, Frank N., author
Frederick A. Preager, 1966
Buku Teks
U.S. Government Printin, 1967
Buku Teks
Nguyen-Vien
Foreign Language Publishing House, 1956
Buku Teks
Trager, Frank N.
Frederick A. Praeger, 1966
Buku Teks