by Ir. Hieronymus Budi Santoso $6.00
by Lipschutz $13.00
by Malvino $20.00
by Drs. A.W. Widjaja $9.00
by Thompson Susa $12.00
by Daniel J. Mueller $7.00
by George S. Clason $7.00
by Ir. L. Widarto $5.00