RT Journal Article SR Electronic T1 Buying and selling practices JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 431 OP 431 VO 36 IS 290 A1 J. Robson A1 K. Boomla A1 A. Jewell A1 J. Self A1 J. Taylor YR 1986 UL http://bjgp.org/content/36/290/431.2.abstract AB