by Hefni Effendi $9.00
by A. M. Putut Prabantoro $6.00
by A. Rahman I Doi $6.00
by F. A. Suwandi Wihardjo, B. Sc $6.00
by Dr. H. Abuddin Nata, MA $7.00
by Mgr. Herman Josef Spital $6.00