Enrique Pérez, J., Adsuar, J. and Padilla, E. A. (1957) “A Survey for Common Tobacco- and Pepper-Mosaic Viruses in the Filler-Tobacco Area of Puerto Rico”, The Journal of Agriculture of the University of Puerto Rico, 41(1), pp. 20–24. doi: 10.46429/jaupr.v41i1.12628.