00259nam a2200097Ia 4500008004100000082003100041100002000072245003500092260002600127300000800153140113s9999    xx            000 0 und d  a631.617(544.6)(082.2)   L7  a"Jaiswal, P.L."  aDesrtification and its control  a1977bICARcNew Delhi  a358