by Prof. Dr. Suharsimi Arikunto $13.00
by Dr. H. Abuddin Nata, MA $7.00
by Drs. Ngadijo A.J $6.00
by Prof. Dr. H. Abuddin Nata, M.A $11.00
by Abel Tasman $6.00
by J. I. G. M. Drost, SJ $11.00