by Agus M. Hardjana $6.00
by Ir. Hieronymus Budi Santoso $5.00
by Prof. Dr. Soekidjo Notoatmodjo $9.00
by Ir. H. Rahmat Rukmana & Hj. Yuyun Yuniarsih, SP., MBA., MM. $6.00
by M. Aleq Sander, S.Dr $22.00
by Dr. Al. Purwa Hadiwardoyo, MSF. $4.00