1. THE LIGHT SCATTERING PROPERTIES OF FOODS
2. G.S. Birth, and K.H. Norris, 1965 . The difference meter for measuring interior quality of foods and pigments in biological tissues. USDA Tech. Bull. No. 1341.
3. A Spectrophotometric Method for Detecting Blood in White-Shell Eggs
4. Analysis of Spectral Reflectance for Measuring Pork Quality
5. J.J. Gaffney, and G.S. Birth, 1976 . Nondestructive detection of Alternaria in oranges. Presented at the Annual Meeting of the American Society of Agricultural Engineers, Lincoln, NE.