Observation balloon

Title (Dublin Core): Observation balloon
Subject (Dublin Core): en Technology; en Reconnaisance
Article Title and/or Image Caption (Dublin Core): Spotting the Submarines From the Observation Balloon; Caption: Observer slides down after looking all day from a
kite balloon for submarines and other hostile craft
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War I
Date Issued (Dublin Core): 1918-04
Is Part Of (Dublin Core): Popular Science Monthly, v. 92, n. 4, 1918
pages (Bibliographic Ontology): 578
Rights (Dublin Core): Public Domain (Google digitized)
Source (Dublin Core): Google Books
Archived by (Dublin Core): Filippo Valle; Alberto Bordignon (Supervisor)