by Radhar Panca Dahana $7.00
by Drs. H. Moh. Pabundu Tika, M.M $7.00
by Prof. Dr. Suharsimi Arikunto $11.00
by B.J. Marwoto & H. Witdarmono $13.00
by Tobi Moektijono $5.00
by Prof. Drs. Piet A. Sahertian $7.00