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Changes to The Bluebook's system of citation, rule and table numbering, and pagination occur only during major edition revisions. However, within an edition, small errors are corrected, references to changed external information are updated, and examples and text are occasionally improved. These minor updates are included in each new printing of the printed Bluebook. (A printed Bluebook states its printing opposite the inside title page.) This page lists updates made in recent printings of the Twentieth Edition of The Bluebook, so that older printings can be updated. The downloadable reference sheet below contains the same information as this online page, formatted for printing.