<style face="normal" font="default" size="100%">The Beginning of System Dynamics</style>

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<style face="normal" font="default" size="100%">The Beginning of System Dynamics</style>

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6

<style face="normal" font="default" size="100%">Principles of Systems</style>

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<style face="normal" font="default" size="100%">Industrial Dynamics </style>