00605nam a2200217 a 450000500170000002000150001710000210003224500420005326000260009530000250012149000230014649000070016950000500017663000120022663000210023863000250025996400160028499700180030099900170031895200520033520251203090810.0  a3540159428  aAngelis,Donald L  aPositive feed back in natural systems  aSpringer Verlagc1986  axii,290p.c22cm.bHB  aBiomathematics Vol  a15  aincludes bibliographical references and index  aEcology  aNatuaral Systems  aMathematical Ecology  bcdefg_  a15288 LIBSC C  c20502d20502  00104070aPUbPUd2000-04-10l0o p15288yBK