| 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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| 7004 | Volume 25 | 1969 | 7005 | Volume 25 | 20-Jan-69 |
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Summary: Cause Analysis. 7007, 7027, 7167 |
Summary: The Two Tracks, solved. 7077 |
| 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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