by Hines, William W.K. Dougles E. Montgomery $11.00
by A.H. Manurung, S.E $7.00
by dr. Endang Lanywati $5.00
by Al. Purwa Hadiwardoyo, MSF. $3.00
by Drs. H. Hamdan Aini $9.00
by Prof. Komaruddin $9.00