• It is a broadcast program and twenty years have elapsed since the end of the year in which it was first aired.
• It is a photographic work, cinematographic work, performance, or software and fifty years have elapsed since the end of the year in which it was created.
• It is another type of work and fifty years have elapsed since the end of the year in which the author died.

本作品在其来源国以及其他著作权期限是作者逝世后70年或以下的国家和地区属于公有领域。

这个作品在美利坚合众国属于公有领域，因为它首次发布早于1929年1月1日，或于该日期之前在美国著作权局登记。