Это произведение находится в общественном достоянии в тех странах, где срок охраны авторского права равен жизни автора плюс 100 лет и менее.

• its author died before 1954;
• the death date of its author is not known, and it was created before 1904;
• it is an anonymous work, a pseudonymous work, or a work made for hire, and it was created before 1904.

The above provisions are contained in 17 U.S.C. § 303. See also this page for more information.