Leonard, Mortimer B. “NOTES ON INSECT CONDITIONS IN PUERTO RICO FOR THE FISCAL YEAR, JULY 1931 THRU JUNE 1932”. The Journal of Agriculture of the University of Puerto Rico 17, no. 2 (April 1, 1933): 97–137. Accessed April 19, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/14245.