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Can you list the top facts and stats about Appletons' Cyclopædia of American Biography?
Summarize this article for a 10 years old
Appletons' Cyclopædia of American Biography is a six-volume collection of biographies of notable people involved in the history of the New World. Published between 1887 and 1889, its unsigned articles were widely accepted as authoritative for several decades. Later the encyclopedia became notorious for including dozens of biographies of people who had never existed. In nearly all articles about the Cyclopædia various authors have erroneously spelled the title as 'Appleton's Cyclopædia of American Biography', placing the apostrophe in the wrong place.