1. Catherall, P. L. (1963). Transmission and effect of barley yellow-dwarf virus isolated from perennial ryegrass. Pl. Path. 12, 157–160.
2. Catherall, P. L. (1964). Rep. Welsh Pl. Breed. Sta. 1963, 84–85.
3. Dickason, E. A., W. B. Raymer and W. H. Foote (1960). Insecticide treatment for aphid control in relation to the spread of barley yellow-dwarf. Pl. Dis. Reptr. 44, 501–504.
4. Endo, R. M. and C. M. Brown (1957). Studies on yellow-dwarf of oats in Illinois. 1956 National Oat Newsletter 7, 5–7.
5. Pizarro, A. C., and D. C. Arny (1958). The persistence of “Systox” in oat plants and its effect on the transmission of barley yellow-dwarf. Pl. Dis. Reptr. 42, 229–232.