Daily Sentinel-Review, 23 Jan 1930, p. 1, column 3 Dietrich bros. of St. Agatha make Heath parasol type aircraft with metal tubes from Woodstock firm; see also 28 Jan., p. 2, col. 4
Daily Sentinel-Review, 23 Jan 1930, p. 1, column 3 Dietrich bros. of St. Agatha make Heath parasol type aircraft with metal …