| 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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| 2495 | Volume 11 | 1948 | 2496 | Volume 11 | 16-May-48 |
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Null-function can be added to or removed from absolute 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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