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4268 | Volume 16 | 7-Dec-52 | 4269 | Volume 16 | 8-Dec-52 |
Summary: Play is an investment of surplus adaptation. 4271 (13), 4425 |
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Model speed of 4251 4555 |
Play as investment |
This page references 3 pages: 4271 4425 4266 This page is referenced from 2 pages: 4267 4426 |
This image is reproduced courtesy of The Estate of W. Ross Ashby. Copyright 1972, 2008 © The Estate of W. Ross Ashby |