by R. Soegeng $16.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $5.00
by WK $16.00
by WK $13.00
by Ir. Juhaeni Radi $5.00
by Ir. Hieronymus Budi Santoso $5.00
by Lars Forssblad $9.00
by Muhammad Ash-Shayim $5.00
by Lies Aryati $6.00
by Ir. H. Rahmat Rukmana, MBA $5.00
by Duane Schlutz $7.00
by Mansyur Semma $18.00