![Darwin, C. R. [1868]. The variation of animals and plants under domestication. With a preface by Asa Gray. New York: Orange Judd and Co. Volume 1. Darwin, C. R. [1868]. The variation of animals and plants under domestication. With a preface by Asa Gray. New York: Orange Judd and Co. Volume 1.](http://darwin-online.org.uk/converted/published/1868_Variation_F879.1/1868_Variation_F879.1_fig179.jpg)
Darwin, C. R. [1868]. The variation of animals and plants under domestication. With a preface by Asa Gray. New York: Orange Judd and Co. Volume 1.
Les pigeons de volière et de colombier, ou Histoire naturelle des pigeons domestiques - Biodiversity Heritage Library
Les pigeons de volière et de colombier, ou Histoire naturelle des pigeons domestiques - Biodiversity Heritage Library
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