00377nam a2200133 a 450000500170000008200180001710000230003524500560005826000350011430000280014950000190017763000120019663000350020820251203090505.0  a577.0724bSYS  aPatten, Bernard C.  aSystems analysis and simulation in ecology - Vol.IV  aNew YorkbAcademic Pressc1976  axx, 593 p.b23 cm.cHB.  aincludes index  aEcology  aSystem analysis and Simulation