00358nam a2200145Ia 4500003000400000005001700004008004100021040000700062041000800069082002100077100002200098245003900120260004000159365001300199OSt20230530151952.0210423s2008    xx            000 0 und d  cAL  aeng  a363.7 223bBHAT  aBHARNEHA (Erach).  aTextbook of environmental studies.  aHyderabadbUniversities Pressc2008  b150cINR