20 years of service.
Walters
E
E
Rocky Mountain Helicopters, Provo, UT.
Stevenson
D
D
D000401:Aircraft; D000552:Ambulances; D003120:Colorado; D004636:Emergency Service, Hospital / Q000266:history / Q000458:organization & administration*; D049673:History, 20th Century; D006745:Hospital Bed Capacity, 300 to 499; D016730:Program Development