Khan, Rahmatullah
Vikas, 1969
Buku Teks
Goodrich, Leland M., author
Thomas Y. Crowell, 1961
Buku Teks
Wright, Quincy, author
Asia Publishing House, 1960
Buku Teks
United Nations, [date of publication not identified]
Buku Teks
United Nations, 1966
Buku Teks