by Alvin S. Johnson $11.00
by Drs. H. Abu Ahmadi $11.00
by Kamaruddin Ahmad., S.E $11.00
by Drs. Harry Waluya $9.00
by Drs. Slamet Saksono $7.00
by Drs. Firman B. Aji dan Drs. Martin Sirait $9.00