@book{21377,
	author = {MATES, BENSON, 1919 and HEGENBERG, LEONIDAS H. B.},
	title = {LOGICA ELEMENTAR},
	publisher = {NACIONAL},
	year = {1968},
	address = {SAO PAULO},
	edition = {1 ed.},
	url = {https://www.santoandre.sp.gov.br/pesquisa/con_detalhe.asp?ID=27817&vHistoryNovo=sim}
}