000 00253nam a22001097a 4500
082 _a420
_bPRA
100 _aHewage, A.K
_ecom
245 _aPractice material
260 _aKalutara
_bDenuma printers and publishers
_c1998
300 _a54 Pages
942 _cL
999 _c19697
_d19697