31. First aid station directly behind front, 1st Division, Nissy sur Bois, July 17, 1918 Publication: [United States:] : U.S. Signal Corps, 1918 Subject(s): Emergency Medical ServicesTransportation of PatientsWorld War I
32. [A first aid station in a bombed-out church] Publication: [United States:] : U.S. Signal Corps, 1918 Subject(s): Emergency Medical ServicesStretchersTransportation of PatientsWorld War I
33. [Ambulances and other vehicles parked by the San Francisco Public Health Service Hospital] Publication: [1923] Subject(s): AmbulancesEmergency Medical ServicesU.S. Marine Hospital, San Francisco.United States. Public Health Service.