Kamerlingh portret

Autor:

NieznanyUnknown author

Credit:

http://www.kb.nl/hkc/nobel/onnes/onnes.html . Further source: (cropped to 600×800), Museum Boerhaave, http://www.museumboerhaave.nl/contact/pers2a.html

Krótki link:

https://www.plwiki.pl/b/715

źródło:

Wikimedia Commons

Wymiary:

600 x 800 Pixel (37669 Bytes)

Opis:

Heike Kamerlingh Onnes

Licencja:

Copyrighted free use

Komentarz do licencji:

Boerhaave website states '(vrij beschikbaar voor publicatie)'. '(freely available for publication)'. Moreover, Kamerlingh Onnes passed away in 1926, and even though the date is not mentioned on the website of the Royal Library we can be pretty sure that it is well before 1923, which makes it PD-US as well