by S.R. Parker, dkk $9.00
by H. Ahmadi Isa $6.00
by Eddy Tano, Dipl. Chem. Eng. $9.00
by Calvin S. Hall & Gradner Lindzey $11.00
by Nuim Hidayat, M.Si $7.00
by Dr. Muhammad bin Andurrahman al-Khumayyis $5.00