Balloon Microphones to Warn of Air Raids

Title (Dublin Core): Balloon Microphones to Warn of Air Raids
Subject (Dublin Core): en Technology; en Anti-aircraft
Article Title and/or Image Caption (Dublin Core): Balloon Microphones to Warn of Air Raids
Contributor (Dublin Core): Lee A. Collins (writer)
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War I
Date Issued (Dublin Core): 1918-09
Is Part Of (Dublin Core): Electrical Experimenter, v. 6, n. 5, 1918
pages (Bibliographic Ontology): 295
Rights (Dublin Core): Public Domain
Archived by (Dublin Core): Sami AKBIYIK; Mikhail Vsemirnov; Alberto Bordignon (Supervisor)