Teachers guidebook in mathe matics statistics and computer science : Grade X : Higher secondary School level, Based on modernized curricula proposed for ISESCO member states / by Bakr A. Hassan, Munir Ahmad, A. Shawky Ibrahim, A. B. Thaheem. Hassan, Bakr A. Mathematics. 510 TEA Includes Index. Rabaat, Morocco : ISESCO, c2001. c2001. 2001 Text xiv, 94 p. : eng