one of the many online resources the Seattle Public Library offers is an archive of Helix, "Seattle's first underground newspaper", published from 1967-1970. they're complete scans! really neat stuff.
most of the covers are the kind of groovy art you might expect of a hippie zine from that era, but for one of their 1969 issues, for the 50th anniversary of the Seattle General Strike, they just straight up reprinted a Seattle Union Record newspaper cover from 1919 as their front/back cover, with a sidebar explaining it and a cartoon overlay.
anyway, this is your reminder to check out the stuff your local library has to offer online! you never know what you'll find.