Gálvez Rivas BR, Vásquez de Alfaro RP, Cerna Aguiñada JC, Melgar Nájera Óscar A. Conformation of Tourism Cluster, pilot test in the municipality of Nahuizalco. Sonsonate. El Salvador. Entorno [Internet]. 2012 Jul. 1 [cited 2025 Dec. 5];(51):20-6. Available from: https://www.camjol.info/index.php/entorno/article/view/6926