Schematic Digital Data Processor PDU, technical drawing, 1971; (https://texashistory.unt.edu/ark:/67531/metapth1637338/m1/1/: accessed July 13, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Schematic Digital Data Processor PDU, technical drawing, 1971; (https://texashistory.unt.edu/ark:/67531/metapth1637338/m1/1/: accessed July 13, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .