00451nam a22001577a 4500008004500000020001800045082001700063100002000080245006500100250001700165260004000182300001700222650002200239650001500261650001700276240104b    2017       ||||| |||| 00| 0 eng d  a9788173718625  a333.707bBHA  aBharucha, erach  aTextbook of environmental studies for undergraduate courses   a2nd, edition  aHyderabadbUniversities pressc2017  axviii, 305p.  aNatural resources  aEcosystems  aBiodiversity