by Drs. H. Malayu S.P. Hasibuan $7.00
by Wahjosumidjo $13.00
by dr. Moses Wong $7.00
by Sotar Baduara & Drs. S. Martin Sirait $6.00
by Prof. Dr. Makmur, M.Si $7.00
by Dr. Oemar Hamalik $7.00