TY  - BOOK
AU  - National center for educational research and development 
ED  - Ministry of national education youth and sports 
TI  - Building up mathematicsp: Pedagogical guide, second year humanites section 
U1  - CRDP 373.7 Math. Guide Gr.11h 
PY  - 1999///
CY  - Sn El Fil
PB  - National center for educational research and development 
KW  - Math-- Study and teaching (Secondary Grade 11) --Pedagogical guide
ER  -