[de] [Gutenberg 61776] • Kulturgeschichte der Nutzpflanzen, Band IV, 2. Hälfte Forgotten Books
[de] [Gutenberg 61775] • Kulturgeschichte der Nutzpflanzen, Band IV, 1. Hälfte Forgotten Books
[en] [Gutenberg 3332] • The Variation of Animals and Plants under Domestication New York University Press
[en] [Gutenberg 43858] • The Botanical Magazine, Vol. 13 / Or, Flower-Garden Displayed Forgotten Books
[en] [Gutenberg 17198] • The Botanical Magazine, Vol. 01 / Or, Flower-Garden Displayed Createspace Independent Publishing Platform
[en] [Gutenberg 62172] • The Botanical Magazine, Vol. 10 / Or, Flower-Garden Displayed Public Domain Books
[en] [Gutenberg 17531] • The Botanical Magazine, Vol. 02 / Or, Flower-Garden Displayed Createspace Independent Publishing Platform
[en] [Gutenberg 17672] • The Botanical Magazine, Vol. 03 / Or, Flower-Garden Displayed Createspace Independent Publishing Platform
[en] [Gutenberg 19123] • The Botanical Magazine, Vol. 05 / Or, Flower-Garden Displayed Createspace Independent Publishing Platform
[en] [Gutenberg 21843] • The Botanical Magazine, Vol. 06 / Or, Flower-Garden Displayed Createspace Independent Publishing Platform
[en] [Gutenberg 45917] • Origin of Cultivated Plants / The International Scientific Series Volume XLVIII Cambridge University Press