"A reference work is a work, such as a book or periodical (or their electronic equivalents), to which one can refer for information. The information is ...
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intended to be found quickly when needed. Such works are usually referred to for particular pieces of information, rather than read beginning to end. The writing style used in these works is informative; the authors avoid use of the first person, and emphasize facts.
Indices are a common navigation feature in many types of reference works. Many reference works are compiled by a team of contributors whose work is coordinated by one or more editors, rather than by an individual author. Updated editions are usually published as needed, in some cases annually (Whitaker´s Almanack, Who´s Who). " - (en.wikipedia.org 02.07.2021)
