Terry, Edward (2012-06-07). "Using Liberator". The IBM 1401 Demo Lab and Restoration Project Computer History Museum. 1401 Competition, mainly the Honeywell 200 with Liberator software. Archived from the original on 2020-02-12. Retrieved 2020-02-12.
Terry, Edward (2012-06-07). "Using Liberator". The IBM 1401 Demo Lab and Restoration Project Computer History Museum. 1401 Competition, mainly the Honeywell 200 with Liberator software. Archived from the original on 2020-02-12. Retrieved 2020-02-12.