EULER, Leonhard

Click on a thumbnail to see the full image


German Democratic Republic 1950


German Democratic Republic 1957


Soviet Union 1957


Switzerland 1957


Switzerland 1979


German Democratic Republic 1983


Russia 2007


Switzerland 2007


Switzerland 2007


Switzerland 2007


Switzerland 2007


Guinea 2009


Guinea-Bissau 2009


Guinea-Bissau 2009


South Korea 2014


Chad 2015