00350nam a22001577a 4500003000500000020001900005038001200024082001500036100002300051245003200074250001200106260003100118300002100149500001500170563000700185NUST  a 9788126511105  aKhadija  a668.9bBIL  aBillmeyer, Fred W.  aTextbook of Polymer Science  a3rd ed.  aNew Delhi :bWiley,c2012.  a578 p. ;b23 cm.  aPaperback.  aPB