Heike_Kamerlingh_Onnes_and_Johannes_Diderik_van_der_Waals.jpg
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Description Heike Kamerlingh Onnes and Johannes Diderik van der Waals.jpg | Johannes Diderik van der Waals (right) and Heike Kamerlingh Onnes in Leiden in front of the helium-‘liquefactor’ http://www.science.uva.nl/research/itf/history.php |
Date | |
Source | http://www.science.uva.nl/research/itf/images/vdwaals_large.jpg |
Author | Unknown author Unknown author |
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Public domain Public domain false false |
This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 70 years or fewer . This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office ) before January 1, 1929. |
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/ PDM Creative Commons Public Domain Mark 1.0 false false