Books
- The Chesapeake Bay: A Problem-Based Unit
- The Stubborn Earth: American Agriculturalists on Chinese Soil, 1898-1937
- Alfred True on agricultural experimentation and research (Three centuries of science in America)
- Chlorophyll a Fluorescence : A Signature of Photosynthesis (Advances in Photosynthesis and Respiration)
- Farm Machinery (Picture Library Series)
Books