by Archie J. Bahm $7.00
by Ir. Sudadi Martodireso & Ir. Widada Agus Suryanto, MM $6.00
by Hefni Effendi $9.00
by Paul J. Wharton $4.00
by Totok Semartho Wiryasaputra $6.00
by Ben Handaya $5.00