"Ephemera (singular: ephemeron) are any transitory written or printed matter not meant to be retained or preserved. The word derives from the Greek ephemeros, meaning "lasting only one day, short-lived". Some collectible ephemera are advertising trade cards, airsickness bags, bookmarks, catalogues, greeting cards, letters, pamphlets, postcards, posters, prospectuses, defunct stock certificates or tickets, and zines." <a href="#cwrc:727d97bc-af78-4122-94be-aa78b2e97d5a">(DBpedia, 2019)</a>