00318nam a2200109Ia 450000500170000000800410001708200140005810000160007224500660008826000460015430000080020020260224040843.0260224s9999||||xx |||||||||||||| ||und||  a574.5 KRE  aKrebs, C.J. 0aEcology: the experimental analysis of distribution, abundance  aNew York: Harper & Row Publicationsc1978  a678