00495nam a2200181Ia 4500 LK-CoDNM 010623t1991 xxu||||| |||| 00| 1 sin d LK-CoDNM LK-CoDNM LK-CoDNM sin 681.31 YAP Yapa,N.U. පුස්තකාලය හා පරිගණකය Pusthakalaya ha Pariganakaya National Library Colombo 1991 123p., 21 cm Library Science BK 0 0 0 0 MONO MAIN MAIN 2023-08-02 0 681.31 YAP 138937 2023-08-02 2023-08-02 BK 115229 115229