00275nam a2200109 a 450000500170000002000150001708200200003210000270005224500360007926000320011530000180014720251203091718.0  a818506153X  a333.79,bD, gur  aGuru D.D., Qamar Ahsan  aEnergy and economic development  aDelhibAmar Prakashanc1987  axi,257p, 22cm