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Metal: A Headbanger's Journey - Wikipedia
Challenges, Free Full-Text
The 'Big 4' Bands of 17 Metal Subgenres
Heavy Metal Sub-Genres Explained – metal dispatch
Main Metal Music Styles @ RockmusicRaider
The History of Heavy Metal
The Journey Continue: WHAT IS HEAVY METAL!!!!!!
Guide to Metal Subgenres
Interview with A.R.S - FILTHY DOGS OF METAL
A History of Heavy Metal. Music genres are often difficult to…, by Christian Harkna