Smithsonian Institution
Smithsonian American Art Museum: Marsden Hartley
As part of the Smithsonian Art Museum's database of artists, this site provides biographical information on Marsden Hartley in addition to an extensive listing of his works as displayed at the museum.
Other
Mining Technology: Ngezi Platinum Mine
Tells the story of Ngezi Platinum Mine in Zimbabwe, which replaced the Hartley Mine of the 1990s, going from underground mining to a pit operation.