“PRELIMINAR STUDY SOURCES AND DOSES OF ORGANIC FERTILIZER IN ONION (Allium Cepa Cv. Regia), IN CERRO PUNTA, BUGABA. 1996-1997”. 2005. Ciencia Agropecuaria, no. 18 (February): 113-22. https://idiap.desarrollo-ojs1.metadatos.org/index.php/ciencia-agropecuaria/article/view/415.