If you go to the paper it would have appeared in they might have an archive online for a fee, otherwise you'd have to look through microfiche at a library etc.
If it was a MAJOR paper like the NYT, Washington Post, Chicago Tribune etc, it might appear in an online database such as ProQuest, but those are also fee based unless you are at a university that has a subscription.
ETA: I almost forgot, go to
Google News and search for your terms, then on the left, you can set a date, and search whats available from the 70's etc. You might have to pay to see the archived material, but you should be able to tell if it's correct from what you can see. It's probably a long shot, but you may get lucky.