by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Fausiah, Fitri, & Julianti Widury $7.00
by Al-Rasid, Harun $11.00
by J.C. Vergouwen $13.00
by Wirakusumah, Sambas $7.00
by Rachmanto $6.00