by Prof. Dr. Budi Winarno $9.00
by Mangasa Sidabutar $7.00
by Lester R. Brown $21.00
by Dr. Ir. Kemas Ali Hanafiah, M.S., dkk $11.00
by ISEI $26.00
by C. A. Qadir $16.00
by Prof. Dr. Soerjono Soekanto, S.H., M.A. $3.00
by Carl-Bernd Kaehlig $96.00
by Yusuf al-Uqshari $9.00