If its obviously junk from a website usually spam just Google it If its something literary Google the author If they were still alive in the last  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 dbcopyvioHerbert  putting the authors info instead of Herbert I dont know what Page Curation does  I cant 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 Itll be unencyclopaedic anyway so even if CSD is declined PROD  should see it off