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  • Videos, Slides, Films

    Downwind downstream

    Author
    Bullfrog Films presents ; produced by Robert Lewis and Christopher McLeod ; written and directed by Christopher McLeod
    Date
    [2016]
    Available As
    Online
  • Videos, Slides, Films

    Poison in the Rockies

    Author
    Bullfrog Films presents ; produced by Christopher McLeod, Robert Lewis ; written and directed by Christopher McLeod ; a production of Earth Image Films for Nova ; WGBH Educational Foundation
    Date
    [2019]
    Available As
    Online
  • Videos, Slides, Films

    Poison in the Rockies

    Author
    Bullfrog Films presents ; A production of Earth Image Films for Nova ; WGBH Educational Foundation ; Producer, Christopher McLeod, Robert Lewis ; writer/director, Christopher McLeod ; for NOVA, senior producer, Kathleen Bernhardt
    Date
    c[200-?], 1990
    Available As
    Physical
  • Videos, Slides, Films

    White water, black gold

    Author
    White Gold Productions ; director/producer/writer, David Lavallee ; writer/editor, Nancy Rosenblum
    Date
    [2011]
    Edition
    [Educational version].
    Available As
    Physical

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