The anti-mine technology called "P. V." used on ships

Title (Dublin Core): The anti-mine technology called "P. V." used on ships
Subject (Dublin Core): en Technology; en Ships; en Explosives and land mines
Article Title and/or Image Caption (Dublin Core): Title: Now You Know What a "P. V." Is
Contributor (Dublin Core): International Film Service (Image copyright)
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): Interwar period
Date Issued (Dublin Core): 1919-03
Is Part Of (Dublin Core): Popular Science Monthly, v. 94, n. 3, 1919
pages (Bibliographic Ontology): 48
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
References (Dublin Core): Government of the United Kingdom
Archived by (Dublin Core): Davide Donà; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): Atlantic Ocean; United Kingdom