Friedrich Rathgen was born in 1862.
Friedrich Rathgen died in 1942.
Friedrich Rathgen has written: 'Verwitterung und Erhaltung von Werksteinen' -- subject(s): Building stones, Testing
Karl Rathgen was born in 1856.
Karl Rathgen died in 1921.
F. Rathgen has written: 'The preservation of antiquities'
Rathgen Research Laboratory was created on 1888-04-01.
Friedrich Born was born in 1903.
Friedrich Golling was born in 1883.
Gerhard Friedrich was born on 1917-09-16.
Friedrich Witte was born in 1979.
Friedrich Neznansky was born in Belarus.
Friedrich Graumann was born in 1941.