Rickards, Maurice and ‎Michael Twyman. The Encyclopedia of Ephemera: A Guide to the Fragmentary Documents of Everyday Life for the Collector, Curator, and Historian. Hove, East Sussex, England: Psychology Press, 2000.

Rickards, Maurice and ‎Michael Twyman. The Encyclopedia of Ephemera: A Guide to the Fragmentary Documents of Everyday Life for the Collector, Curator, and Historian. Hove, East Sussex, England: Psychology Press, 2000.