* New York FBI report, 9 April 1944, John Jacob Abt FBI file 100-236194, serial 6.
* New York FBI report, 9 April 1944, John Jacob Abt FBI file 100-236194, serial 6.
* The Warren Commission Report, Volume X - [http://history-matters.com/archive/jfk/wc/wcvols/wh10/pdf/WH10_Abt.pdf#search='john%20j.%20abt' Testimony of John J. Abt]
* The Warren Commission Report, Volume X - [http://history-matters.com/archive/jfk/wc/wcvols/wh10/pdf/WH10_Abt.pdf#search='john%20j.%20abt' Testimony of John J. Abt]