sentences:  On returning to Finland, 160 of her works, including paintings and sketches but not her print designs, were displayed in a retrospective exhibition in a Helsinki gallery in 1979.From 1980 to 1987 Isola designed patterns for Marimekko jointly (both names appearing on the edge of each print) with her daughter, Kristina; they worked in their own studios, in the winter in Helsinki, in the summer in Kaunismäki.Kristina became one of Marimekko's chief designers; she had joined Marimekko when she was 18.