Thanks for posting this. On the last pages it is said to be licensed under Creative Comments Share alike. I'd assume that the content might still be copyright protected by the original creator? So I don't think that anyone can relicense it as simple as that.
I don't have a moral problem appropriating content that has been published 90 years ago. I don't think it is appropriate to assign it a Commons license though.
The cc-by-sa note in the pdf is presumably because that is the copyright listed on Commons and Flickr.
However, the original work appears to be in the public domain. R & L Lambry were a father (Léon) and son (Robert) who died in 1940 and 1934, respectively. French copyright, as in all of the EU, lasts for the life of the author + 70 years.
Correct. Since i got the files from wikimedia, I wanted to adhere to their license claim and give attribution. I was pretty sure it's P.D. but didn't know if the scans themselves might have a copy right in some jurisdiction.
I don't have a moral problem appropriating content that has been published 90 years ago. I don't think it is appropriate to assign it a Commons license though.