00465nam a2200169Ia 4500082002800000100001700028245004000045260003400085300001000119500000500129690000600134700000500140952010900145964001700254921000900271999001500280  a338.476338952bAl428.NR  aAllen, P. W.  aNatural rubber and the syntheticsb  aLondonbGrosby Lockwoodc1972  a255p.  a  a   a  00104070aISIbISId1998-08-18l0o338.476338952 Al428.NRpDP6551r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a4862  c4862d4862