1. Anonymous. (1978) ”Biological Agents for Pest Control, Status and Prospects.” USDA Special Report, Washington, D.C.
2. “Contemporary Microbial Ecology”;Baker,1980
3. “Biological Control of Plant Pathogens.”;Baker,1974
4. “Leafhopper Vectors and Plant Disease Agents”;Banttari,1979
5. BIOLOGICAL CONTROL OF FIRE BLIGHT