TY  - GEN
AU  - Perera, A.K.S.A.
AU  - Silva , K.K.M.W.
AU  -  Dissanayake , C.B.
AU  - Thurairajah, A.
TI  - Engineering
U1  - 624 
PY  - 1986///
CY  - Nugegoda
PB  - The Open University
KW  - ENGINEERING
ER  -