00458    a2200133   4500003000500000005001700005040000900022082001200031245003400043260002800077300001000105505019200115650001700307Nust20221011152233.0  cNust  a540,CHE  aChemistry TodaycEncyclopedia  aChicagobWorld Book Inc  a154:p  aIntroduction (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).  aEncyclopedia