File:Heike Kamerlingh Onnes - 10 - Johannes Diderik van der Waals (1837-1923), around 35 years old.png
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Heike_Kamerlingh_Onnes_-_10_-_Johannes_Diderik_van_der_Waals_(1837-1923),_around_35_years_old.png (200 × 302 pixels, file size: 40 KB, MIME type: image/png)