by Prof. Dr. Ir. Tri Yuwanta S.U., DEA $7.00
by Ir. Setijo Pitojo $7.00
by Prof. Dr. Sudarwan Danim $9.00
by G. Kartasapoetra dan R. G. Kartasapoetra, S.H $6.00
by Drs. C.S.T. Kansil, S.H $11.00
by Dr. Ir. Muhammad Rasyaf, MS $7.00