@book{193,
	author = {Cohen, Morris and Nagel, Ernest},
	title = {Introducción a la lógica y al método científico},
	publisher = {Amorrortu editores,},
	year = {2000},
	address = {Buenos Aires:},
	url = {https://biblioteca.esfmthea.edu.bo/cgi-bin/koha/opac-retrieve-file.pl?id=28c4fba052a5f35f1561a5ef4a138e87}
}