| 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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| 4714 | Volume 18 | 1953 | 4715 | Volume 18 | 1953 |
| This page is referenced from 3 pages: 4720 4723 4781 | This page references 2 pages: 4723 4884 This page is referenced from 2 pages: 4723 4884 |
| 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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