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Allan Douglas Nicholson (April 26, 1936 – December 9, 1978) was a Canadian ice hockey left winger. Born in Estevan, Saskatchewan, he played in 19 games for the Boston Bruins during the 1955–56 and 1956–57 seasons and recorded one assist. The rest of his career, which lasted from 1955 to 1972, was mainly spent in the minor Western Hockey League.