Carter, G The evolution of air transport systems: a pictorial review. [electronic resource] - The Journal of emergency medicine - 499-504 p. digital Publication Type: Historical Article; Journal Article ISSN: 0736-4679 Standard No.: 10.1016/0736-4679(88)90408-8 doi Subjects--Topical Terms: Aircraft--historyAmbulances--historyEmergency Service, HospitalHistory, 18th CenturyHistory, 19th CenturyHistory, 20th CenturyHumansMilitary Medicine--history