00287nam a2200097Ia 4500008004100000082002100041245006800062260003100130650001600161700001200177220204s9999    xx            000 0 und d  a678:665.6bLON;1 0aProduction of polymer and plastics intermediates from petroleum  aLondonbButterworthsc1967  aCarpolactam  aLong, R