@book{104240,
	author = {Martínez Contreras, Ronald Mauricio,},
	title = {Estudios sectoriales :},
	publisher = {Publicaciones Politécnico Grancolombiano,},
	year = {[2021]},
	address = {Bogotá, Colombia :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/137042/}
}