by Dr. Eti Rochaety, dkk $9.00
by Guenther, Ernest $9.00
by G. Kartasapoetra dan R. G. Kartasapoetra, S.H $6.00
by Prof. Dr. Oemar Hamalik $9.00
by $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00