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In page Judith Butcher:

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Butcher turned her training notes into a house manual for CUP's copy-editors and later into the book published in 1975 by CUP as Copy-editing: The Cambridge Handbook. It was the first copy-editing manual in English and has remained the authority in its field for over 40 years. It has since been renamed Butcher's Copy-editing and is now in its fourth edition.[1] When she retired from employment Butcher kept the book up to date, making extensive revisions to keep abreast of changes in publishing technology and procedures. However, the fundamental principles that she set out remain unchanged.[citation needed]