This article seems to imply that when works enter into the public domain depend on where they were published. This is not true! It's based on where you are and when it was published.I E, if you're in the USA and some work published in a death+50 year country is in the public domain in said country, it would still be illegal to distribute in the US.

Similarly, some works that are published in the US but are not in the public domain there could be perfectly legal to publish in a death+50 year country.