پدیدآورنده این اثر در سال 1906 درگذشته است، پس این اثر در کشورهایی و مناطقی که مدت زمان حق تکثیر، عمر پدیدآورنده بعلاوه 100 سال یا کمتر بعد از مرگ او است، در مالکیت عمومی قرار دارد.
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it was in the public domain in its home country (Russia) on the URAA date (1 January 1996).
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