by Ir. Heinz Frick & FX. Bambang Suskiyatno $6.00
by Raldi Artono $18.00
by Titik F. Djafar - Siti Rahayu $6.00
by WK $12.00
by Thomas Sri Widodo $9.00
by Tanenbaum $13.00
by Kartadjoemena, H.S $9.00
by Malvino $20.00
by Aziz Alimul $7.00
by Dr. Ir. M.M. Sri Setyati Harjadi $7.00
by Drs. Wishnubroto Widarso $5.00