by Ir. Setijo Pitojo $9.00
by Haryoto $5.00
by Ir. Arif Hartoyo, M. S $5.00
by Ir. Rudy Gunawan $6.00
by E. Martasudjita, Pr. $4.00
by Roger W. McIntire $7.00
by Pandji Anoraga, S.E, M.M $7.00
by TO Ihromi $9.00