An autogiro is used to direct artillery fire during a test

Title (Dublin Core): An autogiro is used to direct artillery fire during a test
Subject (Dublin Core): en Technology; en Airplanes and Zeppelins; en Artillery (and shells); en Training
Article Title and/or Image Caption (Dublin Core): Title: "Silent Bombardment" Tests Autogiro
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War II
Date Issued (Dublin Core): 1939-04
Is Part Of (Dublin Core): Popular Science Monthly, v. 134, n. 4, 1939
pages (Bibliographic Ontology): 82
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): United States Army; Philadelphia
Archived by (Dublin Core): Davide Donà; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): United States of America