1. The document contains 20 references cited in the footnotes of a paper. The references are from various sources such as books, dictionaries, encyclopedias published between 1961-2000.
2. The footnotes provide details of the authors, publication details, page numbers etc for each citation. Additional explanatory notes are also included for some citations.
3. The references are provided to support arguments and facts mentioned in the main text through citations. They allow readers to verify sources of information and explore topics in more depth.