TY  - GEN
AU  - Arudprogasam,K.D. ;ed.
AU  - Balasooriya,I ;ed. ; Gunawrdena , N. J ;ed. 
TI  - Environmental studies part II: tha impact of human activites level 3 BTU 1120
U1  - 333.7 
CY  - Nugegoda
PB  - Open University
KW  - ECONOMICES
KW  - NATURAL RESORCES
KW  - ENVIRNMENTAL SCIENCE
ER  -