1. A COMPARISON OF ENGLISH AND CANADIAN TOMATO VIRUS DISEASES
2. 3. G. Burnett, and L. K. Jones (1931 ). The effect of certain potato and tobacco viruses on tomato plants . Washington Agric. Sta. Bull.No. 259.
3. 5. E. M. Johnson (1930 ). Virus diseases of tobacco in Kentucky . Kentucky Agric. Exper. Sta. Bull.No. 306.