Mr. Harris started his advertising career after World War II and was a partner in a number of San Francisco advertising agencies, including Harris, Harlen and Wood, which later became Fletcher Richards Calkins and Holden.
In 1964, Campbell-Ewald purchased both the San Francisco and Los Angeles offices of Fletcher Richards. Mr. Harris, then executive vice president, moved to Detroit and became a member of the eight-man executive committee running Campbell-Ewald and a board member.
Campbell-Ewald's San Francisco and Los Angeles shops were later were sold to Peter Dailey, founder of Dailey & Associates, a Los Angeles shop now owned by Interpublic Group of Cos.
In 1972 Mr. Harris joined Jerry Mander, Alvin Duskin and Dugald Sterner to found Public Interest Communications, a nonprofit agency handling Cesar Chavez's United Farm Workers and the Delancey Street Foundation, along with other causes.
He was known among his advertising colleagues, his family said, for what he believed was the secret to success in the business: "Once you've made the sale, stop talking."