| 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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| 3589 | Volume 15 | 1951 | 3590 | Volume 15 | 1951 |
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Environment reviewed again Essential variables Reviewed again |
Environment reviewed again Essential variables Reviewed again |
| 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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