by Dra. Sutratinah Tirtonegoro $7.00
by Dr. Ir. Supli Effendi $7.00
by Heru Susanto $6.00
by Ir. H. Rahmat Rukmana & Hj. Yuyun Yuniarsih, SP., MBA., MM. $6.00
by Yernelis Sukma, M.S., & Yakup $7.00
by Drs. AS. Sudarmono $11.00