00518nam a22001697a 4500 20120117105945.0 817301180 160.00 9781730118005 160.00 DPL PUB Chawla, Anuj 39357 Inventions-2 / by Anuj Chawla New Delhi Dreamland 2010 J-128, Kirti Nagar New Delhi 110015 011-25106050 011-25438283 dreamland@vsnl.com 64p. COL.ill 28 cm Know About Science 39358 ddc CH CHA 61039 61039