00282nam a2200121Ia 4500008004100000041000800041082001800049100001500067245001500082250001000097260004500107300000800152211209s1960    xx            000 0 und d  aeng  a621.8 N60 VIR  aVIRGIL M F  aMECHANISM   a5 ed.  aNEW YORKbMEGRAW-HILL BOOK COMPANYc1960  a294