Effects of heavy industrial pollution on respiratory function in the children of Cubatão, Brazil: a preliminary report - Spektor, Dalia M; Hofmeister, Vera Anna; Artaxo Netto, Paulo Eduardo; Brague, Jose A P; Echelar, Francisco; Nogueira, Diogo Pupo; Hayes, Carl; Thurston, George D; Lippmann, Morton (Environmental Health Perspectives, 1991)