00274nam a2200121Ia 4500008004100000041000800041082001900049100001700068245004000085250001000125260000900135300000800144211209s1979    xx            000 0 und d  aeng  a621.56 N79 BAL  aBALLANEY P L  aREFRIGERATION AND AIR CONDITIONING   a4 ed.  c1979  a765