00251nam a2200097Ia 4500008004100000082001700041100001300058245004100071260003000112300001100142240817s9999    xx            000 0 und d  a678.72 L98,s  aLyman,W. 0aHand book of silicon rubber Fabrican  c1978a New yorkb UNR.co.  a257 p.