by Ir. Suharto $6.00
by Drs. Abas Kartadinata $11.00
by Drs. Sisdjiatmo Kusumosuwidho, M.Sc $9.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Oka A. Yoeti $9.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $11.00