New United States Navy gas masks are independent units

Title (Dublin Core): New United States Navy gas masks are independent units
Subject (Dublin Core): en Technology; en Personal protection (chemical)
Article Title and/or Image Caption (Dublin Core): New United States Navy gas masks are independent units
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): World War I
Date Issued (Dublin Core): 1921-05
Is Part Of (Dublin Core): Popular Mechanics, v. 35, n. 5, 1921
pages (Bibliographic Ontology): 675
Rights (Dublin Core): public domain
Source (Dublin Core): google books
References (Dublin Core): gas mask; chemical warfare
Archived by (Dublin Core): Marco Bortolami; Marco Bortolami (editor)