title: 1989 accident review. Helicopter accidents set second lowest record in decade.
authors: H M
authors: HM
authors: Collett
mesh_terms: D000060:Accidents, Aviation / Q000706:statistics & numerical data*; D000401:Aircraft / Q000706:statistics & numerical data; D000552:Ambulances / Q000706:statistics & numerical data; D006801:Humans; D014481:United States / Q000453:epidemiology