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User:Penno~dewiki

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My name is Martin Penno, member of the German Wikimedia Deutschland e.V. I studied chemistry and hold a PhD degree in physical chemistry. I am an enthusiastic wikipedia user. Sometimes, I improve wikipedia pages Penno~dewiki (talk) 05:29, 16 June 2018 (UTC)Cite error: There are <ref> tags on this page without content in them (see the help page)..