by Burhanuddin $0.00
by Anwar, Moh. Arsjad, dkk $6.00
by Tamir Agmon $7.00
by Indrasari Tjandraningsih, Hari Nugroho, Surya Tjandra $10.00
by Tinbergen, Jan $6.00
by Dr. Achmad S. Ruky $9.00
by Denny Indrayana $6.73