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Frederick Koch, Who Spurned Family Business, Dies at 86 - The New York Times
The Koch Brothers Are Sitting on a Real Estate Empire Worth Hundreds of Millions - WSJ
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Bill Koch (businessman) - Wikipedia
Fred Koch Is The Oldest Of The Four Koch Brothers – He Spent His Life Avoiding Family Business And Politics Is Dead At 86 | Celebrity Net Worth
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The shunned, possibly gay Koch brother no one knows about
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Frederick Koch, Who Spurned Family Business, Dies at 86 - The New York Times
