%0 Journal Article %T Direct mass spectrometry of polymers. IX. Copoly(carbonate‐urethanes) prepared by reorganization of polycarbonates with piperazine %A Foti, Salvatore %A Giuffrida, Mario %A Maravigna, Pietro %A Montaudo, Giorgio %J Journal of Polymer Science Polymer Chemistry Edition %V 21 %N 6 %P 1599-1615 %@ 0360-6376 %D 1983-06-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve