Autograph letter signed : Heidelberg, to a friend and colleague, 1875 Apr. 13.
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Bunsen, Robert Wilhelm von, 1811-1899.
http://n2t.net/ark:/99166/w6p05mc9 (person)
German chemist. From the description of Autograph letter signed : Heidelberg, to a friend and colleague, 1875 Apr. 13. (Unknown). WorldCat record id: 270520258 ...