David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
David Koch - Wikipedia
Charles Koch
Why the Koch brothers' political machine is 'unrivalled in America' | CBC News
David Koch dies: Who are the Koch brothers?
Charles And David Koch Plan To Spend $20 Million To Promote Tax Overhaul | KMUW
Koch brothers under attack by leftwing film-maker | US politics | The Guardian
KOCH Newsroom | Charles Koch on the passing of his brother, David Koch
What Is the Koch Brothers' Net Worth? See How They Spend Their Wealth
Meet the Koch Brothers - Again - ABC News
David Koch dies at 79. With brother, moved U.S. politics to right - Los Angeles Times
What the Koch Brothers own — Quartz
How Charles and David Koch will wield their power in the 2016 race.
The Next Koch Doesn't Like Politics - POLITICO Magazine
Charles Koch & David Koch | TIME
David Koch, billionaire conservative activist and philanthropist, dies at 79
Charles and David Koch | Biographies, Politics, & Facts | Britannica
David Koch dies: Who are the Koch brothers?
Who are the Koch brothers? | PBS NewsHour
The NY Times' absurd Koch brothers conspiracy
David Koch Dies; Billionaire Industrialist Funded Conservative Causes : NPR
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
