00306nam a2200109Ia 4500008004100000082001500041100002100056245005400077250000900131260004700140300000900187240913s9999||||xx |||||||||||||| ||und||  a577  ODU/E  aBy Eugene P Odum 0aEcology and our endangered life - support systems  aNULL  bSinauer Associates IncaMassachusetsc1989  a284p