Gertsen, Aleksandr Ivanovich , author
Pravda, 1983
Buku Teks
Brumfiel, Charles Francis, 1914-, author
Addison-Wesley, 1961
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah