TY  - GEN
AU  - Selvaratnam, M.
AU  - Tantrigoda, Ramani U.
AU  -  Tantrigoda , Ramani U. 
TI  - Basic principles of chemistry part 1
U1  - 540 
PY  - 1995///
CY  - Nugegoda
PB  - Open University
KW  - CHEMISTRY
ER  -