Who are the Koch brothers? - BBC News
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
Kochs to double election spending in 2016 | Financial Times
What Is the Koch Brothers' Net Worth? See How They Spend Their Wealth
Charles and David Koch - TheXtraordinary
The Koch Brothers' Covert Ops | The New Yorker
KOCH Newsroom | Charles Koch on the passing of his brother, David Koch
Exclusive: Koch brothers will not use funds to try to block Trump nomination | Reuters.com
Charles Koch & David Koch | TIME
Charles G. Koch – Wikipedia
Ex-guard: Dying billionaire David Koch's wife mistreated him - New York Daily News
Charles und David Koch: Unsichtbare Wahlkämpfer - Politik - SZ.de
Inside Charles and David Koch's Business Empire | Fortune
David H. Koch – Wikipedia
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
KOCH Newsroom | Announcement from Charles Koch on David Koch's Retirement
The Brothers Koch: Rich, Political And Playing To Win : NPR
How Charles and David Koch will wield their power in the 2016 race.
David Koch Net Worth 2021 - David Koch Has Died
David Koch Kids & Family: 5 Fast Facts You Need to Know | Heavy.com
Samuel Ramey, Charles Koch and David Koch attend New York City... ニュース写真 - Getty Images
The Koch brothers vs. God | Salon.com
