00351nam a22001337a 4500082001200000100002200012245004600034260003600080300000900116490003800125505002200163650002300185650000900208  a547 THU  aThuraisingham,R.A  aOrganic Chemistry Part1- Block.1(sinhala)  aColombobOpen Universityc198.3  a247p  aOrganic chemistry-Part 1 -PSUIIC3  aBachelor Science   aOrganic, chemistry  aOUSL