Naval gun-fire "spotters" trained on miniature sea

Title (Dublin Core): Naval gun-fire "spotters" trained on miniature sea
Subject (Dublin Core): en Technology; en Training
Article Title and/or Image Caption (Dublin Core): Naval gun-fire "spotters" trained on miniature sea
Language (Dublin Core): eng
Date Issued (Dublin Core): 1921-09
Is Part Of (Dublin Core): Popular Mechanics, v. 36, n. 3, 1921
pages (Bibliographic Ontology): 402-403
Rights (Dublin Core): public domain
Source (Dublin Core): google books
References (Dublin Core): U-boat
Archived by (Dublin Core): Marco Bortolami; Marco Bortolami (editor)