1. Serological tests for the identification of plant viruses;BALL,1961
2. Comparative studies on the bacteria associated with potato black leg and seed piece decay;BONDS;Phytopathology,1939
3. Bergey's Manual of Determinative Bacteriology;BREED,1957
4. Erwinia atroseptica (van Hall) Jennison and Erwinia carotovora (Jones) Holland;BURKHOLDER;Phytophatology,1959
5. Manual of bacterial plant diseases;DOWSON,1949