Bogahawatte, V. T. L.
Building materials in Sri Lanka - Colombo 05 Natural Resources Energy & Science Authority 1993 - 39p.: ill. - Science education series ; 32 .
BUILDING MATERIALS-Sri Lanka
691(548.7) / B6
Building materials in Sri Lanka - Colombo 05 Natural Resources Energy & Science Authority 1993 - 39p.: ill. - Science education series ; 32 .
BUILDING MATERIALS-Sri Lanka
691(548.7) / B6