TY  - BOOK
AU  - National center for educational research and development
ED  - Ministry of national education youth and sports
TI  - Chemistry: Pedagogical guide, specimen collection orbitales secondary education first year 
U1  - CRDP 373.7 Chim. Guide Gr.10 
PY  - 1998///
CY  - Sin El Fil
PB  - National center for educational research and development
KW  - Chemistry -- Study and teaching (Secondary Grade 10) -- Pedagogical guide
ER  -