00326nam a2200121Ia 4500008004100000041001200041082002100053100003000074245003300104260005000137300000800187650000900195231217s9999    xx            000 0 und d  aEnglish  a621.47  UTI;1  R  aUtility Publications Ltd. 0aEnergy conservation handbook  c1988bUtility Publications Ltd.aSecunderabad  a346  ajkjj