Air craft combines helicopter and balloon

Title (Dublin Core): Air craft combines helicopter and balloon
Subject (Dublin Core): en Technology; en Airplanes and Zeppelins
Article Title and/or Image Caption (Dublin Core): Air craft combines helicopter and balloon
Contributor (Dublin Core): WM. H. Hunt (writer)
Language (Dublin Core): eng
Date Issued (Dublin Core): 1921-08
Is Part Of (Dublin Core): Popular Mechanics, v. 36, n. 2, 1921
pages (Bibliographic Ontology): 255
Rights (Dublin Core): public domain
Source (Dublin Core): google books
References (Dublin Core): helicopter
Archived by (Dublin Core): Marco Bortolami; Marco Bortolami (editor)