Nolla, J. A. B. “STUDIES ON DISEASE RESISTANCE I. A TOBACCO RESISTANT TO ORDINARY TOBACCO MOSAIC”. The Journal of Agriculture of the University of Puerto Rico 19, no. 1 (January 1, 1935): 29–128. Accessed July 1, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/14275.