1. Anand & Sahambi, Indian Phytopath. 18: 204, 1965.
2. Badami, Bull. natn. Inst. Sci. India 24: 166, 1963.
3. Bawden, Nature, Lond. 177: 302, 1956.
4. Bawden, J. gen. Microbiol. 18: 751, 1958.
5. Bawden & Kassanis, Virology 34: 174, 1968.
6. Capoor, Curr. Sci. 19: 22, 1950.
7. Capoor, Phytopathology 52: 393, 1962.
8. Capoor & Varma, Curr. Sci. 17: 57, 1948.
9. Capoor & Varma, Indian J. agric. Sci. 26: 95, 1956.
10. Capoor, Varma & Uppal, Curr. Sci. 16: 151, 1947.
11. Chant, Ann. appl. Biol. 47: 565, 1959.
12. Das & Raychaudhuri, Indian Phytopath. 16: 214, 1963.
13. Das Gupta, De & Raychaudhuri, Nature, Lond. 168: 114, 1951.
14. Haque & Chenulu, Phytopath. Z. 59: 277, 1967.
15. Kassanis & McCarthy, J. gen. Virol. 1: 425, 1967.
16. Lister & Thresh, Nature, Lond. 175: 1047, 1955.
17. Nagaich & Vashisth, Indian J. Microbiol. 3: 113, 1963.
18. Nariani & Kandaswamy, Indian Phytopath. 14: 77, 1961.
19. Raychaudhuri, Curr. Sci. 16: 26, 1947.
20. Raychaudhuri, Nariani & Das, Indian Phytopath. 15: 79, 1962.
21. Rees & Short, Virology 26: 596, 1965.
22. Rees & Short, Virology 50: 772, 1972.
23. Rees & Short, Biochim. biophys. Acta 393: 15, 1975.
24. Rees, Short, Self & Eagles, Biomedical Mass Spectrometry 1: 237, 1974.
25. Sulochana & Solomon, Proc. Indian Acad. Sci. Sect. B. 71: 56, 1970.
26. Toler, Phytopathology 54: 910, 1964.
27. van Velsen & Crowley, Aust. J. agric. Res. 13: 220, 1962.