To F. T. Köppen 28 April [1871]
Summary
Thanks for FTK’s locust paper ["Die geographische Verbreitung der Wanderheuschrecke", Petermann’s Geogr. Mittheil. (1871)].
| Author: | Charles Robert Darwin |
| Addressee: | Friedrich Theodor Köppen (Fedor Petrovich Keppen) |
| Date: | 28 Apr [1871] |
| Classmark: | Archive of the Russian Academy of Sciences, St Petersburg branch: SPBB ARAS (Fond 92. Register 1. Folder 112. P. 1, 1 r) |
| Letter no: | DCP-LETT-7723 |
