This work was first published on the Libya and is now in the public domain because its copyright protection has expired by virtue of the Copyright Protection Law, enacted 1968. The work meets one of the following criteria:
It is an anonymous work or pseudonymous work and 25 years have passed since the date of its publication
It is a work published after the death of the author and 50 have passed since the year of death of the author (or last-surviving author)
It is a photographic or cinematographic work that is not compositive (artistic in nature) and 5 years have elapsed since the end of the year of its publication
It is a work created by a legal public or private entity and 30 years have passed since the year the work was created
It is another type of work and than 25 years have elapsed since the the year of death of the author (or last-surviving author) and fifty years have elapsed since the year of publication.
It is one of "official documents such as texts of laws, decrees, regulations, international agreements, legal judgements and various official documents"
Bạn cũng cần phải kèm theo một thẻ phạm vi công cộng tại Hoa Kỳ để ghi rõ tại sao tác phẩm này lại thuộc về phạm vi công cộng tại Hoa Kỳ. Lưu ý rằng tác phẩm này có thể không thuộc về phạm vi công cộng tại các quốc gia không công nhận quy tắc thời hạn ngắn hơn và có thời hạn bản quyền dài hơn cuộc đời tác giả cộng thêm 50 năm. Cụ thể, Mexico là 100 năm, Jamaica là 95 năm, Colombia là 80 năm, Guatemala và Samoa là 75 years, Thụy Sỹ và Hoa Kỳ là 70 năm, và Venezuela là 60 năm.
Public domainPublic domainfalsefalse
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.