003830000a22001450004500020001500000060000800015082001700023100002100040245006900061250000600130260003700136260000900173300000800182650004700190  a0060437715  a100  a574.5072 KRE  aKrebs, Charles J  aEcology: the experimental analysis of distribution and abundance  a2  aNewyork, Harper & row publishers  c1978  a678  aEcology/population biology/nutrient cycles