00384nam a22001577a 4500003000600000005001700006008004100023020001400064040000800078082001200086100001800098245002900116260003300145300001800178440003000196MWNLS20110128114840.0110128t        xxu||||| |||| 00| 0 eng d  a140823166  cdlc  a547.843  aWalker, O.J.   aPlastics /cO.J. Walker.  aLondon :bLongmans,cc 1967.  a32 p. :bill.  aChemistry background book