RT Journal Article SR Electronic T1 Practical Guide for Medical Officers for Environmental Health JF Journal of Medical Ethics JO J Med Ethics FD BMJ Publishing Group Ltd and Institute of Medical Ethics SP 160 OP 160 DO 10.1136/jme.7.3.160 VO 7 IS 3 A1 J A Muir Gray YR 1981 UL http://jme.bmj.com/content/7/3/160.1.abstract AB