Avantasia: Marco Hietala (NIGHTWISH) on new album! | FrontView Magazine
MARCO HIETALA opens up about his decision to leave NIGHTWISH – Arrow Lords of Metal
Marco Hietala | Discography | Discogs
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Marco Hietala - Wikidata
MARKO 'MARCO' HIETALA On His Decision To Leave NIGHTWISH: 'It Was A Long Process' - BLABBERMOUTH.NET
Marko Hietala music, videos, stats, and photos | Last.fm
File:Marco Hietala en Buenos Aires (Argentina) 2012.JPG - Wikimedia Commons
Nightwish Bassist Marco Hietala Leaves Band After 20 Years