00500nam a22001577a 4500 20120116121856.0 8121932955 99.00 9788121932950 99.00 DPL PUB Energy and Heat by Kathryn, whyman New Delhi S. Chand 2010 7361, Ram Nagar, Qutab Road, New Delhi 110055 23672080-81-82 011-23677446 info@schandgroup.com 32p. Col.ill 29 cm (pbk) Science World 39265 ddc CH WHY 60957 60957