Electric sirens

Title (Dublin Core): Electric sirens
Subject (Dublin Core): en Technology; en Anti-aircraft
Article Title and/or Image Caption (Dublin Core): Caption: "Left: close view of one of the electric sirens that warns Paris of approaching air raids".
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War I
Date Issued (Dublin Core): 1918-01
Is Part Of (Dublin Core): Popular Mechanics, v. 29, n. 1, 1918
pages (Bibliographic Ontology): 45
Rights (Dublin Core): Public domain
Source (Dublin Core): babel.hathitrust
Archived by (Dublin Core): Iacopo Tonon
Spatial Coverage (Dublin Core): Paris