by Dr. H. Pidyarto Gunawan, O.Carm $4.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00
by M. Fauzil Adhim & M. Nazhif Masykur $6.00
by I. Bambang Sugiharto & Agus Rachmat W $11.00
by Ir. Hieronymus Budi Santoso $5.00
by Cynthia Geisen $6.00