by $5.00
by Prof. I. R. Poedjawiyatna $9.00
by Drs. Ngadijo A.J $6.00
by Ir. Mul Muyani Sutedjo $7.00
by A. Tresna Sastrawijaya, M.Sc $7.00
by Yohanes Surya $8.00
by Indra Gunawan & Janti Atmadja $9.00