Charles and David Koch | Biographies, Politics, & Facts | Britannica
Who are the Koch brothers? - BBC News
David und Charles Koch: Romneys reichste Freunde - Menschen & Wirtschaft - FAZ
USA: Milliardäre Charles und David Koch helfen Republikanern vs. Obama - DER SPIEGEL
One Koch Brother Forces the Other Out of the Family Business | The New Yorker
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
Koch and Co. | CNN Politics
David Koch and Charles Koch | TIME
David Koch Net Worth 2021 - David Koch Has Died
David Koch, Billionaire Who Fueled Right-Wing Movement, Dies at 79 - The New York Times
Charles and David Koch: The billionaire brothers 'trying to buy America' | The Independent | The Independent
David H. Koch – Wikipedia
All About The Koch Brothers - Charles and David Koch - YouTube
The Next Koch Doesn't Like Politics - POLITICO Magazine
Meet Julia Flesher Koch, Now One of the World's Richest Women
Who are the Koch brothers? - BBC News
How Charles and David Koch will wield their power in the 2016 race.
BREAKING NEWS: David Koch steps down from Koch Industries, political involvement - Wichita Business Journal
Koch-funded super PAC may back Democratic incumbents against progressive challengers | Salon.com
David und Charles Koch investieren in „Time“-Verlag: In die Höhle des Löwen
The NY Times' absurd Koch brothers conspiracy
Inside Charles and David Koch's Business Empire | Fortune
