WRENCH definition and meaning | Collins English Dictionary
MONKEY WRENCH | English meaning - Cambridge Dictionary
The forgotten story of 'America's most famous tool' - The Boston Globe
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"
What is a monkey wrench? | HowStuffWorks
How Monkey Wrench brought Foo Fighters a whole new audience | Louder