Image:Olsen1921.jpg
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This image is in the public domain in the United States. In most cases, this means that it was first published prior to January 1, 1923 (see the template documentation for more cases). Other jurisdictions may have other rules, and this image might not be in the public domain outside the United States. See Wikipedia:Public domain and Wikipedia:Copyrights for more details. |  |
Image scanned by hhbruun from: Olsen, C. (1921) Studier over Jordbundens Brintionkoncentration og dens Betydning for Vegetationen særlig for Plantefordelingen i Naturen. - H. Hagerups Boghandel. Doctoral Thesis, University of Copenhagen.
The Danish and international copyright has expired.
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| Date/Time | Dimensions | User | Comment | |
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| current | 19:57, 8 July 2007 | 591×1,000 (43 KB) | Hhbruun (Talk | contribs) |
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