1. Ducks in Missouri. Leaflet No. 1;Hall;Missouri State Poultry Experiment Station.,1925
2. Duck Raising.;Lee;Farmer’s Bulletin 697, United States Department of Agriculture.,1917
3. Profitable Ducks. Circular Bulletin No. 15;Terry;Department of Agriculture (Live stock branch) Province of British Columbia.,1916
4. Raising Ducks and Geese on New Jersey Farms.;Thompson;Hints to Poultryman Department of Poultry Husbandry, New Jersey Agricultural Experiment Station,1922