00439nam a2200109Ia 4500008004100000082001900041245012100060260002300181942000700204999001700211952010100228220204s9999    xx            000 0 und d  aNR:041967bIRS 0aReview of the present position and prospects for the newer rubbers: Proceedings of a symposium by IRSG, Brazil, 1967  aLondonbIRSGc1967  cBK  c21359d21359  00104070aMAINbMAINd2021-12-16l0oNR:041967 IRSp02076r2021-12-16 00:00:00w2022-02-14yBK