You can start here, “'No Vacancies' for Blacks: How Donald Trump Got His Start And Was First Accused of Bias”
www.nytimes.com/2016/08/28/u...
nytimes.com
‘No Vacancies’ for Blacks: How Donald Trump Got His Start, and Was First Accused of Bias (Published 2016)
As Mr. Trump assumed an increasing role in his father’s business, the company’s practice of turning away potential black tenants was painstakingly documented.