Here is a link to a PDF of the Cox report on the Reece Committee concerning the operations of tax-exempt foundations. There exists only 1 printed copy of this report that is in the possession of Charlotte T. Iserbyt. It is a Congressional report for which all copies were collected from public libraries and destroyed.

Be patient with their web server. It cannot take high volumes of traffic for downloading.

http://deliberatedumbingdown.com/ddd/wp-content/uploads/2018/04/Tax_Exempt_Cox_All.pdf