@book{93315,
	author = {Agafošin, Nikolaj Petrovič, and Beltrán, José,},
	title = {Ley periódica y sistema periódico de los elementos de D. I. Mendeleiev :},
	publisher = {Editorial Reverté,},
	year = {[2010]},
	address = {Barcelona :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/110566/}
}