1. Multiple regression analysis in the epidemiology of plant disease.;Butt,1974
2. “Introduction to Plant Disease Epidemiology”;Campbell,1990
3. “Regression Analysis by Example”, Chapter 4: Qualitative variables as regressors;Chatterjee,1977
4. “The Nature and Prevention of the Cereal Rusts as Exemplified in the Leaf Rust of Wheat”;Chester,1946