Tudalennau sy'n cysylltu â "Delwedd:Portrait of W. (Willem) Einthoven, professor of Physiology and Histology at Leiden University Icones 332.tiff"
Mae'r tudalennau isod yn cysylltu â Delwedd:Portrait of W. (Willem) Einthoven, professor of Physiology and Histology at Leiden University Icones 332.tiff:
Ceir 1 eitem.
- Willem Einthoven (cyswllt ffeil) (← dolenni | golygu)