by Prof. Djafaruddin $9.00
by Suharso, A.S.P $9.00
by $20.00
by H. Rahmat Rukmana $5.00
by Drs. G. Kartasapoetra $7.00
by Dr. P. Hardono Hadi $7.00
by Ir. Budi Samadi $6.00