Biography of Bernhard Riemann (1826-1866) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Riemann.html
Biography of Hermann Weyl (1885-1955) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Weyl.html
Biography of Hermann Minkowski (1864-1909) ...
turnbull.dcs.st-and.ac.uk/~history/Mathematicians/Minkowski.html
Biography of Hendrik Lorentz (1853-1928) ...
turnbull.dcs.st-and.ac.uk/%7ehistory/Mathematicians/Lorentz.html
Biography of Alexander Friedmann (1888-1925) ...
turnbull.dcs.st-and.ac.uk/~history/Mathematicians/Friedmann.html
Biography of Karl Schwarzschild (1873-1916) ...
turnbull.dcs.st-and.ac.uk/~history/Mathematicians/Schwarzschild.html
Biography of Willem De Sitter (1872-1934) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Sitter.html
Biography of Gregorio Ricci-Curbastro (1853-1925) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Ricci-Curbastro.html
Biography of Luigi Bianchi (1856-1928) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Bianchi.html
Biography of Marcel Grossmann (1878-1936) ...
www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Grossmann.html