File:Monkey wrench derivative from Rogers 1903 p172.png - Wikipedia

File:Monkey Wrench (PSF).png - Wikimedia Commons

Wrench

Monkey Wrench Wiki

Various Hand Tool Makers [Page 4]

PDF) ALLS, Vol 5, No 2 (2014) Charles Marfo, Advances in Language and Literary Studies [ALLS], Hooshang Khoshsima, Esther Hooi, Sajid Chaudhry PhD., Philo Abaka, and Moussa Pourya

PDF) The Homebrew Industrial Revolution: A Low-Overhead Manifesto

All Roads Lead to “Philosophy”

Kanji Tesis Historica, PDF, Chinese Characters

Roger Moquin - Wikidata

monkey wrench - Wiktionary, the free dictionary

Early Sports and Pop Culture History Blog: Charles Monk, Monkey Wrenches and a Monkey on a Stick - a Gripping History and Etymology of Monkey Wrench