Possible uses for periscopes in peacetime

Title (Dublin Core): Possible uses for periscopes in peacetime
Subject (Dublin Core): en Technology; en Submarines; en Reconnaisance
Article Title and/or Image Caption (Dublin Core): Peace-Time Peeps through Periscopes. Useful in many places beside the submarine
Contributor (Dublin Core): Keystone View Company (image copyright); Underwood & Underwood (image copyright)
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): Interwar period
Date Issued (Dublin Core): 1919-08
Is Part Of (Dublin Core): Popular Science Monthly, v. 95, n. 2, 1919
pages (Bibliographic Ontology): 23
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): no man's land; Princess Patricia of Connaught
Archived by (Dublin Core): Davide Donà; Alberto Bordignon (Supervisor)