* Oral history interview with J. Presper Eckert, Charles Babbage Institute, University of Minnesota.
* Oral history interview with J. Presper Eckert, Charles Babbage Institute, University of Minnesota.
* Oral history interview with J. Presper Eckert, Charles Babbage Institute, University of Minnesota.
* Oral history interview with J. Presper Eckert, Charles Babbage Institute, University of Minnesota.
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