BLB oxygen mask and aviation.
Miller
J M
JM
D000532:Altitude Sickness / Q000266:history* / Q000517:prevention & control; D001359:Aviation / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008397:Masks / Q000266:history*; D010100:Oxygen / Q000008:administration & dosage*; D014481:United States
D010100:Oxygen