RT Journal Article SR Electronic T1 Using helium-oxygen mixtures in the management of acute upper airway obstruction JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 555 OP 558 VO 128 IS 5 A1 Skrinskas, G. J. A1 Hyland, R. H. A1 Hutcheon, M. A. YR 1983 UL http://www.cmaj.ca/content/128/5/555.abstract