Más, E. G. & M. de L. Lugo-Torres,
Common Weeds in Puerto Rico & U.S. Virgin Islands. University of Puerto Rico. USDA Natural Resources Conservation Service, 2013
Más, E. G. & M. de L. Lugo-Torres,
Common Weeds in Puerto Rico & U.S. Virgin Islands. University of Puerto Rico. USDA Natural Resources Conservation Service, 2013