by Abel Tasman $6.00
by Peter Burns $12.00
by Prof. Dr. H. Zainuddin Ali, M. A. $0.00
by Prof. Dr. Suharsimi Arikunto $13.00
by Ir. H. Sudirman, Mpi & Prof. DR. Ir. Achmad Mellawa $9.00
by Bahrie, A. Ma. Pd $7.00