00326nam a2200073Ia 4500008004100000082002500041245016300066260002300229220204s9999    xx            000 0 und d  aNR:063IRS1962bIRS;3 0aFuture of natural and synthetic rubbers: Proceedings of a Symposium organised by the International Rubber Study Group, 29 May to 1st June 1962, Washington DC.  aLondonbIRSGc1962