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| Keywords: F-R Helmert 1.jpg Portrait of Friedrich Robert Helmert 1843 “ 1917 a German geodesist founder of physical geodesy This portrait is taken from my private collection of portraits of great scientist Helmert died in 1917 almost 90 years ago and the picture itself is over 100 years old The author is unknown PD-old 1917 deaths 1843 births Scientists from Germany Friedrich Robert Helmert | ||||
