Roque, Arturo. “BACTERIAL WILT OF TOBACCO IN PUERTO RICO AND ITS INTERTRANSMISSION TO OTHER SOLANACEOUS HOSTS”. The Journal of Agriculture of the University of Puerto Rico 17, no. 2 (April 1, 1933): 145–156. Accessed November 23, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/14247.