00275nam a2200109Ia 4500008004100000041000800041082001900049100001800068245002600086260004500112300000800157211209s1961    xx            000 0 und d  aeng  a604.26 N61 BET  aBETTERLEY M L  aSHEET METAL DRAFTING   aNEW YORKbMCGRAW-HILL BOOK COMPANYc1961  a319