00337    a2200133   4500020001500000082001300015100001700028245003100045250001200076260005800088300001800146650001200164650002700176  a0706986768  a577bKUM  aKumar, H. D.  aModern concepts of ecology  a7th ed.  aNew DelhibVikas Publishing House Pvt Ltdc1977g1992  ax,377p.c21cm  aEcology  aLife sciences  Biology