Citation :
« In 1951, funded by the steel industry, Dunclaren Productions produced their last film entitled Friendly Interchange. [...] chronicling the trade relationship between Canada and the United States of America between the 18th century and the Cold War period [...]. Alma Duncan included 150 colourful drawings representing the Steep Rock Iron Mine. »
-- Jaclyn Meloche

Source :
MELOCHE, Jaclyn. Braiding the Boundaries: A Dialogical Study of Alma Duncan's Art from the 1940s and 1950s, 2004. Thèse de maîtrise, Carleton University. (pp. 75-76) [en anglais]