Ozeanographie Brennecke, Wilhelm creator Forschungsreise S.M.S. "Planet", 1906/07 contributor text book Berlin K. Siegismund 1909 1909
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GER Vol. 3 of Forschungsreise S.M.S. "Planet", 1906/07. Oceanography GC11 B74 https://www.biodiversitylibrary.org/bibliography/49966 174544684 10.5962/bhl.title.49966 OTU