David A. Johnston's primary photo
David A. Johnston
Primary photo for David A. Johnston

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David A. Johnston

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Credits

1 title
Archive Footage (1 title)
How the Earth Was Made
How the Earth Was Made (2010)
(TV Series) - Self - Volcanologist, U.S. Geological Survey (archive footage) (1 episode, 2010) Self - Volcanologist, U.S. Geological Survey (archive footage) (1 episode, 2010)   See fewer
Mount St. Helens (Feb 2, 2010) Season 2, Episode 10 - Self - Volcanologist, U.S. Geological Survey (archive footage) Self - Volcanologist, U.S. Geological Survey (archive footage)   See fewer
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