Acosta-M., Miguel. “DETERMINATION OF THE CRITICAL PERIOD OF COMPETITION OF WEEDS IN COWPEA BEAN Vigna Unguiculata (Walp) IN ALANJE, PANAMA, 1989.”. Ciencia Agropecuaria, no. 7 (February 15, 1991): 43-48. Accessed December 7, 2025. http://www.revistacienciaagropecuaria.ac.pa/index.php/ciencia-agropecuaria/article/view/495.