TY  - BOOK
AU  - Wong,Teck Ong
TI  - Acids and bases: a teaching unit for the lower secondary school 
PY  - 1974///
CY  - Penang
PB  - SEAMEO Regional Centre for Edu. in Science and Mathematics
KW  - Acids
KW  - Study and teaching
KW  - Bases (chemistry)
KW  - study and teaching
ER  -