au.\*:("JURKOWSKI D")
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CHRONIC OBSTRUCTIVE PULMONARY IN TWO CITIES OF CONTRASTING AIR QUALITYNERI LC; MANDEL JS; HEWITT D et al.1975; CANAD. MED. ASS. J.; CANADA; DA. 1975; VOL. 113; NO 11-2; PP. 1043-1046; BIBL. 10 REF.Article