Velasco, José Armando, and María Elena García. “Evaluation of the Nutritional Quality of the Food Supply of Six School Cafeterias in the City of San Salvador”. Revista Científica Crea Ciencia 10, no. 1 (June 30, 2016): 27–33. Accessed July 18, 2024. https://camjol.info/index.php/CREACIENCIA/article/view/5566.