It should be on the top or bottom of the pages, or check with the library to make sure.
I'd hate to see you go to all the trouble of getting it posted and us finding out it is copyrighted and having to remove it.

Or if you do a web search on the title & author , names, dates and such something should come up and maybe then you can find out if it is copyrighted or not.

Many papers & articles are fine to copy & keep for your own personal use, but when you post, or distribute it, that is where the legal factors come into play.