David Koch is leaving Koch Industries, stepping down from Americans for Prosperity – The Denver Post
Charles Koch - Wikipedia
David Koch Dead: Billionaire and Conservative Activist Died at Age 79 - Rolling Stone
David Koch Dies; Billionaire Industrialist Funded Conservative Causes : NPR
KOCH Newsroom | Charles Koch on the passing of his brother, David Koch
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
Who are the Koch brothers? - BBC News
The Koch Brothers' Covert Ops | The New Yorker
The Next Koch Doesn't Like Politics - POLITICO Magazine
Koch and Co.
Charles and David Koch - TheXtraordinary
David Koch and Charles Koch | TIME
Twitter users - including Bette Midler - post cruel messages celebrating the death of David Koch | Daily Mail Online
One Koch Brother Forces the Other Out of the Family Business | The New Yorker
What Is the Koch Brothers' Net Worth? See How They Spend Their Wealth
KOCH Newsroom | Charles Koch and David Koch Appear on MSNBC's Morning Joe
Who are the Koch brothers? | PBS NewsHour
KOCH Newsroom | Brothers yes, but Charles and David Koch are not "brainless robots"
KOCH Newsroom | Announcement from Charles Koch on David Koch's Retirement
Twitter users - including Bette Midler - post cruel messages celebrating the death of David Koch | Daily Mail Online
Inside Charles and David Koch's Business Empire | Fortune
Charles Koch & David Koch | TIME
How Charles and David Koch will wield their power in the 2016 race.
What Is the Koch Brothers' Net Worth? See How They Spend Their Wealth
Five Myths About the Koch Brothers — And Why It Matters To Set Them Straight – BillMoyers.com
