Omnigraphics is a publishing company located in Detroit, Michigan, founded by Frederick Gale Ruffner, Jr. and his son Peter in 1985. The company was acquired by Aggregate Intelligence in 2015.About Us – Retrieved October 3, 2014"Gale Research founder Frederick Ruffner dies at 88" Crain's Detroit Business. – Retrieved October 3, 2014"Frederick Ruffner, founder of reference book powerhouse Gale Research, dies at 88" Detroit Free Press. – Retrieved October 3, 2014 It was sold to Infobase Publishing in 2022.
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