I used to collect old pulp magazines, of the same vintage as your newspaper; they used the same kind of paper, if not worse.
Just keep them in a box in a cool, dry place; make sure that no light is getting into the box. Roll them if you think they'll be okay; me, I'd store then flat in the bottom of a big packing box. That's what I'm doing with some fragile '20s-era newspapers I picked up 10 years ago, and they haven't deteriorated a bit.
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