TY  - GEN
AU  - Arudpragasam , K.D. 
AU  - Balasooriya , I. 
AU  - Gunawardene , N.J. 
TI  - Environmental studies part II :  the impact of human activities level  3 BTU 1120
U1  - 333.7 
CY  - Nugegoda
PB  - The Open University
KW  - Natural Resource
KW  - Environment
ER  -