"Big Bertha" made from logs looks like real cannon

Titolo: "Big Bertha" made from logs looks like real cannon
Oggetto: en Technology; en Trivialization (other)
Article Title and/or Image Caption: "Big Bertha" made from logs looks like real cannon
Lingua: eng
Copertura temporale: interwar period
Data di rilascio: 1935-04
pagine: 523
Diritti: Public Domain (Google digitized)
Sorgente: Google Books
Referenzia: Big Bertha; Chelan National Forest
Archived by: Alessandro Barcaro; Alberto Bordignon (Supervisor)