Julius Popper died in 1893.
Julius Popper was born in 1857.
Albert Popper died in 1889.
Siegfried Popper died in 1933.
Hans Popper died in 1988.
Erwin Popper died in 1955.
Josef Popper-Lynkeus died in 1921.
David H. Popper died in 2008.
Karl Popper died on September 17, 1994 at the age of 92.
Joachim Edler von Popper died in 1795.
He is still alive!
A. A. Julius died in 1865.
Josef Popper has written: 'Das Recht zu leben und die Pflicht zu sterben' -- subject(s): Philosophy