Public domain status depends on national law, and a work may be in the public domain in some countries but not in others. (noshelfrequired.com)
I had to write to them to request they release it from public domain status. (karencommins.com)
Again, seek an attorney's help on how to properly use quoted material, gain written permissions for it, or confirm its public domain status in order to help mitigate your legal risk. (toughnickel.com)