The Relation between(Number of cigarettes and duration)with 2nd polycythemia in Baghdad. Journal of the College of Basic Education, [S. l.], v. 19, n. 78, p. 197–204, 2022. DOI: 10.35950/cbej.v19i78.7318. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/7318.. Acesso em: 30 jun. 2024.