00378    a2200145   4500020001500000082001600015100002000031245002000051260004700071300001800118650001200136650003300148650003900181650001200220  a017448187X  a577.27bHAY  aHayward, Geoff   aApplied ecology  aWaltonbThomas Nelson and sonsc1992g1992  ax,230p.c28cm  aBiology  aEffects of humans on ecology  aSpecific factors affecting ecology  aEcology