| 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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| 0737 | Volume 04 | 1939 | 0738 | Volume 04 | 8-Dec-39 |
| This page references page 735 |
This page references page 617 |
| 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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