PT - JOURNAL ARTICLE AU - PB TI - Essentials of Respiratory Disease AID - 10.1136/thx.46.4.275-b DP - 1991 Apr 01 TA - Thorax PG - 275--276 VI - 46 IP - 4 4099 - http://thorax.bmj.com/content/46/4/275.3.short 4100 - http://thorax.bmj.com/content/46/4/275.3.full SO - Thorax1991 Apr 01; 46