TY - JOUR T1 - ENVIRONMENTAL HEALTH SERVICE JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 635 LP - 635 VL - 24 IS - 146 AU - David S. Ross Y1 - 1974/09/01 UR - http://bjgp.org/content/24/146/635.1.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -