Yard pictures “GM deisal power service training” truck backed up to boathouse. Man at door of trailor. Manset Marine Supply on left with American flag flying. Lumber piled in foreground. Negative marked 9. The Charles Butt Collection
W. H. Ballard, “Southwest Boat Corporation,” Mount Desert Island Historical Society, accessed January 9, 2025, https://mdihs.digitalarchive.us/items/show/5588.Item 5954
