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4220 | Volume 16 | 1952 | 4221 | Volume 16 | 1952 |
Optimum selection for egg-laying |
Discrimination in selection 4640 4865 |
This page references page 4239 |
This page is referenced from page 4205 |
This image is reproduced courtesy of The Estate of W. Ross Ashby. Copyright 1972, 2008 © The Estate of W. Ross Ashby |