RT Journal Article SR Electronic T1 NIGHT CALLS IN GROUP PRACTICE JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 752 OP 753 VO 29 IS 209 A1 S. L. Barley YR 1979 UL http://bjgp.org/content/29/209/752.abstract AB