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10 Pages in
Charles Darwin's Library
associated with "people/references - Sprengel, Conrad"
Beiträge zur Kenntniss der Befruchtung der vollkommeneren Gewächse
By: Gärtner, Carl Friedrich von,
Publication info: Stuttgart, E. Schweizerbart, 1844
Pages:
Page 328
Untersuchungen über die Bedeutung der Nektarien in den Blumen
By: Kurr, Johann Gottlob von,
Publication info: Stuttgart, Henneschen Buchhandlung, 1833
Pages:
Page 28
Page 28
Page 38
Page 40
Page 79
Page 79
Page 83
Page 138
Page 139