Lan hau jabetza publikoan dago bai bere jatorrizko herrialdean, bai egile eskubideak egilea hil eta 100 urtera edo gutxiagora iraungitzen diren gainerako herrialdeetan. 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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