TY  - GEN
AU  - Perera, H.D.B.S.
TI  - Trend analysis of the use of naturl resources in the construction industry
SN  - 9559017098
U1  - 333.7 
PY  - 2002///
CY  - Colombo
PB  - The Department of National Planning
KW  - Environment
ER  -