00333nam a22001337a 450000500170000000800410001702000150005808200130007310000240008624500250011025000110013526000420014630000110018820260327053810.0260327b        |||||||| |||| 00| 0 eng d  a9555732876  a600b425  aGoonawardane Kanthi  aSCIENCE & TECHNOLOGY  a2nd Ed  aNugegodabSarasavi Publishers,c2005.  a82 pag