1. Bennett, Phytopathology 44: 905, 1944.
  2. Bergeson, Athow, Laviolette & Thomasine, Phytopathology 54: 723, 1964.
  3. Chambers, Francki & Randles, Virology 25: 15, 1965.
  4. Corbett & Roberts, Phytopathology 52: 902, 1962.
  5. Crowley, Davison, Francki & Owusu, Virology 39: 322, 1969.
  6. Davison & Francki, Virology 39: 235, 1969.
  7. Diener & Schneider, Virology 29: 100, 1966.
  8. Dunleavy, Phytopathology 47: 681, 1957.
  9. Fromme, Wingard & Priode, Phytopathology 17: 321, 1927.
  10. Fulton, Phytopathology 52: 375, 1962.
  11. Fulton, Phytopathology 59: 236, 1969.
  12. Gooding, Phytopathology 59: 114, 1969.
  13. Hollings, Ann. appl. Biol. 55: 447, 1965.
  14. Kahn, Scott & Monroe, Phytopathology 52: 1211,1962.
  15. Komuro & Iwaki, Ann. phytopath. Soc. Japan 34: 7, 1968.
  16. Lister, Raniere & Varney, Phytopathology 53: 1031, 1963.
  17. McGuire, Phytopathology 54: 799, 1964.
  18. McLean, Pl. Dis. Reptr 46: 877, 1962.
  19. Messieha, Phytopathology 59: 943, 1969.
  20. Price, Phytopathology 26: 665, 1936.
  21. Price, Am. J. Bot. 27: 530, 1940.
  22. Rani, Verma&Verma, Pl. Dis. Reptr 53: 903, 1969.
  23. Rush, Gooding & Ellis, Phytopathology 58: 1065, 1968.
  24. Schneider, Science, N.Y. 166: 1627,1969.
  25. Schneider & Diener, Virology 35: 150, 1968.
  26. Schuster, Pl. Dis. Reptr 47: 510, 1963.
  27. Semal, Nature, Lond. 182: 1688, 1958.
  28. Stace-Smith, Reichmann & Wright, Virology 25: 487, 1965.
  29. Steere, Phytopathology 46: 60, 1956.
  30. Thomas, Phytopathology 59: 633, 1969.
  31. Valleau, Bull. Ky agric. Exp. Stn. 327: 43, 1932.