RT Journal Article SR Electronic T1 HOW MANY PATIENTS? JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 848 OP 848 VO 22 IS 125 A1 Melvin Ross A1 Anthony C. M. Inwald A1 Dorothy J. Haas YR 1972 UL http://bjgp.org/content/22/125/848.2.abstract AB