Aviators were given an extra supply of oxygen they could use in case of emergency

Title (Dublin Core): Aviators were given an extra supply of oxygen they could use in case of emergency
Subject (Dublin Core): en Technology; en Airplanes and Zeppelins; en Other
Article Title and/or Image Caption (Dublin Core): How Aviators Get Oxygen at High Altitudes
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): Interwar period
Date Issued (Dublin Core): 1919-01
Is Part Of (Dublin Core): Popular Science Monthly, v. 94, n. 1, 1919
pages (Bibliographic Ontology): 60
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
Archived by (Dublin Core): Davide Donà; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): Europe