| This image is reproduced courtesy of The Estate of W. Ross Ashby. Copyright 1972, 2008 © The Estate of W. Ross Ashby |
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| 5646 | Volume 20 | 1957 | 5647 | Volume 20 | 1957 |
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Essential variables within random machine Vital variables in random system |
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| This image is reproduced courtesy of The Estate of W. Ross Ashby. Copyright 1972, 2008 © The Estate of W. Ross Ashby |
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