File:Heike Kamerlingh Onnes - 01 - The installation with which Heike Kamerlingh Onnes was the first to liquefy helium on 10 July 1908, Steenschuur, Leiden.png
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Heike_Kamerlingh_Onnes_-_01_-_The_installation_with_which_Heike_Kamerlingh_Onnes_was_the_first_to_liquefy_helium_on_10_July_1908,_Steenschuur,_Leiden.png (400 × 589 pixel, dimensione del file: 159 KB, tipo MIME: image/png)