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Pendulum
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This is the original index card for the keyword "Pendulum".


equations of 2020 Lotka's set 6321 6628
This image is reproduced courtesy of The Estate of W. Ross Ashby. Copyright 1972, 2008 © The Estate of W. Ross Ashby
Home | Journal | Bookshelf | Index | Other | Timeline | Symbols | Refs | Abbreviations | Help | Copyright