by dr. Titus S. Pusponegoro, Prof. dr. Hans E. M. $5.00
by $11.00
by Prof. dr. Arjatmo Tjokronegoro, Ph.D $5.00
by Prof. Subowo, dr. M.Sc., Ph.D $7.00
by Brooks $20.00
by Aziz Alimul $9.00