00299nam a2200109Ia 4500008004100000082001900041245005300060260002600113650001700139700001700156700001600173220204s9999    xx            000 0 und d  a678.664bADV.1 0aAdvances in urethane science and technology. V 1  aConnbTechnomicc1971  aPolyurethane  aFrisch,  K C  aReegen, S L