RT Journal Article SR Electronic T1 A PRACTICAL APPROACH TO ASTHMA JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 518 OP 518 VO 37 IS 304 A1 Charles Daly YR 1987 UL http://bjgp.org/content/37/304/518.3.abstract AB