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Former New York City Mayor Ed Koch with real estate tycoon Donal Trump photographed in New York City, New York in the 1980's Stock Photo - Alamy
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Empires Of New York': Why did Trump sue New York City after feud with Mayor Ed Koch in the 1980s? | MEAWW
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New York Times Report Finds President Donald Trump Was Involved in Tax Fraud with Father Fred Trump in 1990s
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Amazon.com: Greed and Glory: The Rise and Fall of Doc Gooden, Lawrence Taylor, Ed Koch, Rudy Giuliani, Donald Trump, and the Mafia in 1980s New York eBook : Deveney, Sean: Kindle Store
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Donald Trump's feud with former New York mayor Edward Koch reignites - despite the city chief being dead | The Independent | The Independent
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One of the Koch Brothers wrote an op-ed warning against President Trump's "big businesses" agenda | Salon.com
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