00520 a2200157 4500 Nust 20221011152233.0 Nust 540,CHE Chemistry Today Encyclopedia Chicago World Book Inc 154:p Introduction (Page-8), Atoms, Elements And Molecules (Page-12), Major Groups Of Elements (Page-22), Organic Chemistry (Page-66), Biochemistry (Page-104), Analytical Chemistry (Page-126). Encyclopedia 99921 ddc BK 183286 183286 0 0 ddc 0 0 MCS MCS GEN 2016-12-12 540,CHE MCS27518 2016-12-08 2016-12-12 BK Almirah No.25, Shelf No.1