E=MC²: The Most Urgent Problem of Our Time. ; In Science Illustrated, Vol. I, No. 1., April 1946. Pp. 16–17
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First edition
New York: McGraw-Hill, 1946. First edition. Einstein's first printed use, under his own name, of the equation in its now canonical standalone form, E=mc². The relation itself originated in Einstein's 1905 work on special relativity, which established the equivalence of mass and energy, but the familiar concise notation did not first appear in an Einstein publication. Its true first appearance in print is in Hendrik A.
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