How U. S. military and naval depots are protected from spies

Title (Dublin Core): How U. S. military and naval depots are protected from spies
Subject (Dublin Core): en Technology; en Communication
Article Title and/or Image Caption (Dublin Core): Who Are You, Anyway?
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): Interwar period
Date Issued (Dublin Core): 1919-10
Is Part Of (Dublin Core): Popular Science Monthly, v. 95, n. 4, 1919
pages (Bibliographic Ontology): 51
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): Federal Government of the United States of America; Quartermaster General of the United States Army
Archived by (Dublin Core): Davide Donà; Alberto Bordignon (Supervisor)
Spatial Coverage (Dublin Core): United States of America