00269nam a2200109 a 450000500170000008200190001710000060003611000330004224500430007526000220011830000190014020251203091653.0  a631.6,bD, tec  d_  aAbrol, Narayana, V.V. Dhruva  aTechnologies for wasteland development  aDelhibICARc1990  axii,403p, 23cm