TY  - GEN
AU  - Pararajassingham,E.
AU  - Mendis,D.L.O.
AU  - Bandara,Nilanthi 
TI  - Technology society and environment
U1  - 333 
PY  - 1990///
CY  - Nugegoda
PB  - Open University
KW  - ECONOMICS
ER  -