by Dr. Niels Mulder $11.00
by Ir. H. Rahmat Rukmana, MBA., M.Sc. & Uu Sugandi Saputra, B.Sc $6.00
by Ir. Hatta Sunanta, B.Sc., MS $6.00
by Dr. Muslim Nasution $6.00
by Wahid Abdus Salam Bali $12.00
by T. Krispurwana Cahyadi, SJ $7.00