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| 1947 | Volume 08 | 17-Jun-45 | Poona, India | 1948 | Volume 08 | 21-Jun-45 | Poona, India |
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Natural Selection [25]: Waves on the coast as selective operators, 1737. So is a ratchet, 1836. Erosion and rain has a peculiarity, 1947. Summary: The peculiarities of a system (may) impose "drifts" on the field, to which any path must conform. |

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