00412nam a2200169Ia 4500003000400000005001700004008004100021040000700062041000800069082002100077100001800098245005400116250000600170260004200176300001100218365001300229OSt20230504141156.0210423s2007    xx            000 0 und d  cAL  aeng  a574.5 223bRANS  aRANA (S V S).  aEssentials of ecology and environmentals science.  a3  aNew DelhibPHI Learning Pvt Ltdc2007  axv,536  b275cINR