by Drs. Muchdarsyah Sinungan $9.00
by J. Price Gittinger $6.00
by Dr. W. Herdin Sibuea $11.00
by G. Sexilla, Cousuelo, dkk $7.00
by RW. Allard $11.00
by Drs. Djalinus Syah, Dra. Azimar Enong, dan H.N. Murdiati Sulastomo $7.00
by Drs. Syaiful Bahri Djamarah $7.00