Haeckel; his life and work Bölsche, Wilhelm, 1861-1939 creator text book Philadelphia Jacobs [1906] 1906
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ENG Translation of Ernst Haeckel; ein Lebensbild. Evolution Haeckel, Ernst, 1834-1919 History https://www.biodiversitylibrary.org/bibliography/29349 14779477 WZ 100 H133B 1906 10.5962/bhl.title.29349 NLM