Unix Magazines and Newsletters
The Australian Unix Users Group Newsletter (AUUGN) covers the adoption and use of Unix in Australia from 1978 through to 2005.
The Usenix ;login magazine has been the main technical Unix user's magazine since the mid 1970s.
The UK Unix Users Group has an archive of newsletters from 1992 to 2011.
Unix Review was a magazine in the 1980s and 1990s that covered the technical aspects of C and Unix along with news about the various Unix systems at the time. Several articles in the January 1985 issue cover the history of Unix.