1. The use of numbers of infections for comparing the concentration of plant virus suspensions;Bald;Ann. Appl. Biol.,1937
2. Measurement of concentration of plant virus suspensions;Bald,1950
3. Infection of Nicotiana glutinosa L. following injection of two strains of tobacco mosaic virus into a single cell;Benda;Virology,1956
4. Superinfection by strains of tobacco mosaic virus;Fulton;Phytopathology,1951
5. Studies on acquired immunity with tobacco and aucuba mosaics;Kunkel;Phytopathology,1934