TY - JOUR T1 - CHANGES IN THE ENVIRONMENT—AN EPIDEMIOLOGIST'S VIEW JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 605 LP - 606 VL - 25 IS - 157 AU - P. Wintersgill Y1 - 1975/08/01 UR - http://bjgp.org/content/25/157/605.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -