by Dr. Ir. Adji Sastrosupadi, MS $11.00
by Feri Surya Putra $5.00
by Drs. M. Sastrapratedja $11.00
by C.J. Bohm, MSC. $4.00
by A. P. Budiyono Hd. $3.00
by Sastrodiwirjo, Soemargo, dkk $5.00