00263nam a2200073Ia 4500008004100000082002500041245010000066260002300166220204s9999    xx            000 0 und d  aNR:063IR 1962bIRS;3 0aFuture of Natural and synthetic rubbers: Proceedings of a symposium 29-31, May 1962, Washington  aLondonbIRSGc1962