BRIEF [O.A.] Schultze, Bernhard Sigmund Author: Schultze, Bernhard Sigmund Recipient: Haeckel, Ernst Dating: 06.05.1916
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BRIEF [O.A.] Schultze, Bernhard Sigmund Author: Schultze, Bernhard Sigmund Recipient: Haeckel, Ernst Dating: 16.02.1914