00298nam a2200109Ia 450000500170000000800410001708200150005810000180007324500390009126000500013030000080018020260225051009.0260224s9999||||xx |||||||||||||| ||und||  a621.57 STO  aW.F. Stoecker 0aRefrigertion and air conditioning   aSingapore: McGraw-Hill Inter. Book Co. c1958  a397