File:Ernst Abbe (Heliogravure Emil Tesch).png
The author died in 1931, 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 80 years or fewer.
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
Other versions
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, 1929.
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stamp 1956
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stamp 1989 -
Enciclopedia României
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