What Is the Theory of Relativity? by Albert Einstein
= What Is the Theory of Relativity? by Albert Einstein
{c}
{tag=Work by Albert Einstein}
{title2=1919}
https://germanhistorydocs.org/en/weimar-germany-1918-1933/albert-einstein-what-is-the-theory-of-relativity[English text of the 28 November 1919 Times article].