Books
- Threshers (Farm Tractor Color History)
- Irrigation agriculture in the southwest United States: Regional variation of crop patterns (Marburger geographische Schriften)
- Three Farms: Making Milk, Meat, and Money from the American Soil
- Discovering Beekeeping (Discovering Series No. 236)
- The Story of Land: A World History of Land Tenure and Agrarian Reform
Books