If it s obviously junk from a website usually spam just Google it If it s something literary Google the author If they were still alive in the last 75 years just put Author still alive or Author only died in xxxx as appropriate On Twinkle it asks for a source or URL if available just stick it in there If you do it manually use db copyvio Herbert putting the author s info instead of Herbert I don t know what Page Curation does I can t stand the thing If it looks like a copy from a manual try Google and if nothing comes up try a copyvio tag explaining that it looks like a manual It ll be unencyclopaedic anyway so even if CSD is declined PROD should see it off