by WK $11.00
by Ir. Abbas Siregar Djarijah & Ir. Harsono Puspowardoyo $6.00
by Y. Bambang Mulyono $5.00
by Thabrani $12.00
by Ir. Dede Juanda J.S. & Ir. Bambang Cahyono $6.00
by J. Donald Walters $5.00
by James Patterson $9.00