Markers set at intervals of 10 nautical miles to simplify navigation for planes

Title (Dublin Core): Markers set at intervals of 10 nautical miles to simplify navigation for planes
Subject (Dublin Core): en Technology; en Other
Article Title and/or Image Caption (Dublin Core): Flyers' signposts
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War II
Date Issued (Dublin Core): 1944-02
Is Part Of (Dublin Core): Popular Science Monthly, v. 144, n. 2, 1944
pages (Bibliographic Ontology): 102
Rights (Dublin Core): Public Domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): Cessna
Archived by (Dublin Core): Lorenzo Chinellato; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): United States of America; Wichita