Device converts tractor into trench digger

Title (Dublin Core): Device converts tractor into trench digger
Subject (Dublin Core): en Technology; en Trenches and fortifications; en Other
Article Title and/or Image Caption (Dublin Core): Device converts tractor into trench digger
Language (Dublin Core): eng
Date Issued (Dublin Core): 1922-12
Is Part Of (Dublin Core): Popular Mechanics, v. 38, n. 6, 1922
pages (Bibliographic Ontology): 885
Rights (Dublin Core): public domain
Source (Dublin Core): google books
Archived by (Dublin Core): Marco Bortolami; Marco Bortolami (editor)