by St. Darmawijaya, Pr $3.00
by Herry Mohammad, dkk $12.00
by Haryoto $5.00
by Ir. Sri Umiyati Sumeru & Dra. Suzy Anna $6.00
by Bambang Agus Murtidjo $6.00
by Ir. H. Rahmat Rukmana, MBA., M.Sc. & Uu Sugandi Saputra, B.Sc $6.00