by A. Malik Fadjar $11.00
by Prof. Dr. Ahmad Shalaby $7.00
by Drs. Ajat Sudrajat $7.00
by Helbert A. Simon $13.00
by P. A. Elliot $9.00
by Prof. Drs. Anas Sudijono $11.00
by Ir. Budi Samadi $0.00