TY  - BOOK
AU  - Perera , K. Sarath D.
TI  - Descriptive chemistry of elements unit I
SN  - 9789552313042
U1  - 546 
PY  - 2012///
CY  - Nawala
PB  - Open University of Sri Lanka
KW  - Chemical Elements--Study and Teaching
KW  - Chemistry, Inorganic--Study and Teaching
KW  - Chemical Elements
KW  - Chemistry, Inorganic
ER  -