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Ecology in the twentieth century: a history Get access Sabine Wichert Sabine Wichert Search for other works by this author on: Oxford Academic Google Scholar German History, Volume 8, Issue 3, July 1990, Pages 366–367, https://doi.org/10.1093/gh/8.3.366 Published: 01 July 1990
S. Wichert (Sun,) studied this question.