Boyd, Hugh. “Wildfowling in the U.S.A. And Britain - The Importance of Wildfowling in the United States and Britain - A Review of National Survey of Fishing and Hunting, 1955”. Wildfowl (January 1, 1957): 5. Accessed December 18, 2025. https://tidsskrift.dk/Wildfowl/article/view/155509.