Pearl Harbor Attack Newspapers Discovered.

I was out picking this morning when I came upon this yard sale out in front of an old house. The man that was running the sale showed me an old stack of newspapers from the 1940's. Most were ruined from mildew storage. What I didn't realize until a short while ago is what a "HONEY HOLE" that sale was. As I dug into the pile I purchased I stumbled upon these December 7, 1941 dated papers inside the stack.
My question now is--What kind of frame can I put these in and would it be safe to have a paper backing behind these? Do I need to ask whomever I purchase the frames from is if the backing paper is "ACID FREE"?
Let us never forget the brave souls who lost thier lives at Pearl that Sunday morning.