TY  - BOOK
AU  - Arimba ,Antony Mugiira
TI  - Effects of advance organizers on secondary school students' achievement and self concept in chemistry in Maara District, Kenya 
AV  - THE QD 40 .A75 2012
PY  - 2012///
CY  - Chuka 
PB  - Chuka University
KW  - Chemistry--Study and teaching
ER  -