by Heinz Frick & Petra Widmer $5.00
by Turban, Rainer $26.00
by M. Fakhri Husein $12.00
by WK $12.00
by Dra. Rostamailis $9.00
by Ir. M. Lies Suprapti $6.00
by Nasution, Harun $5.00
by Asep Gunawan (editor) $13.00
by - $30.00
by Tarwoto $9.00
by Prof. dr. D. Bachtiar Lubis, dr. Sylvia D. Elvira $7.00