00479nam a22001577a 450000500170000001000150001702000260003203500130005803700130007110000170008424500690010126000300017027000680020030000340026850000190030220130710112126.0  aENG-107925  a9788120347861c375.00  aEN-91458  bDBAD/PUB  aRana, S.V.S.  aEssentials of Ecology and enivonmental science /cby S.V.S. Rana  aDelhibPHI Learningc2013  aRimjhim house, 111, Patparganj Industrial EstatebDelhie110092  axvi, 590p. :c26cm(pbk)bill.  aIncludes index