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These are sketches from Howard Odums translation of an ecosystem:<br> | These are sketches from Howard Odums translation of an ecosystem and Jay Forrester concept of other systems:<br> | ||
[[File:an energy flow diagram.jpg|left|500px]] | [[File:an energy flow diagram.jpg|left|500px]] | ||
[[File:odum symbols.jpeg|right|500px]] | [[File:odum symbols.jpeg|right|500px]] | ||