Helicopters

Title (Dublin Core): Helicopters
Subject (Dublin Core): en Imagined technology & prototypes; en Airplanes and Zeppelins
Article Title and/or Image Caption (Dublin Core): Helicopters - Rotating-wing aircraft exhibit desirable characteristics for national defense
Contributor (Dublin Core): Alexander Klemin
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War II
Date Issued (Dublin Core): 1940-09-01
Is Part Of (Dublin Core): Scientific American, v. 163, n. 3, 1940
pages (Bibliographic Ontology): 138
Rights (Dublin Core): Public domain
References (Dublin Core): Igor Sikorsky
Archived by (Dublin Core): Stefano Furi