Hovering flying machine rises straight up

Title (Dublin Core): Hovering flying machine rises straight up
Subject (Dublin Core): en Transport; en Airplanes and Zeppelins
Article Title and/or Image Caption (Dublin Core): Hovering flying machine rises straight up
Language (Dublin Core): eng
Date Issued (Dublin Core): 1921-04
Is Part Of (Dublin Core): Popular Mechanics, v. 35, n. 4, 1921
pages (Bibliographic Ontology): 499
Rights (Dublin Core): public domain
Source (Dublin Core): google books
References (Dublin Core): helicopter
Archived by (Dublin Core): Marco Bortolami; Marco Bortolami (editor)