00458nam a22001457a 4500008004100000040005500041080001700096100001500113245006700128260006000195300001500255650001500270653001300285653001400298230515b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aR 678 bJ6.1  aRoff, W J   aFibres, plastics and rubbers: ba handbook of common polymers   aLondon: bButterworths Scientifics Publications, c1956  axvi, 400p.  aIndustries  aRubbers   aPalstics