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From John Hellins 10 May 1869
Summary
Notes sex ratios in Lepidoptera he is breeding.
Author: | John Hellins |
Addressee: | Charles Robert Darwin |
Date: | 10 May 1869 |
Classmark: | DAR 166: 138 |
Letter no: | DCP-LETT-6745 |
Author
Hellins, John | (1) |