File:De Raum Zeit Minkowski 005.jpg

	The author died in 1924, so this work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 90 years or less. This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1923.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.

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