Willem Einthoven (1860-1927).
Davies
M K
MK
Hollman
A
A
D004562:Electrocardiography / Q000266:history*; D005197:Famous Persons; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008800:Mexico; D009426:Netherlands; D010678:Philately