Submarine with disappearing gun

Title (Dublin Core): Submarine with disappearing gun
Subject (Dublin Core): en Technology; en Submarines
Article Title and/or Image Caption (Dublin Core): A Gun Which Will Lie Down; Caption: This modem submarine has a disappearing gun which folds away below deck
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War I
Date Issued (Dublin Core): 1918-03
Is Part Of (Dublin Core): Popular Science Monthly, v. 92, n. 3, 1918
pages (Bibliographic Ontology): 368
Rights (Dublin Core): Public Domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): United States of America; German Empire
Archived by (Dublin Core): Filippo Valle; Alberto Bordignon (Supervisor)