Emerson W. Pugh, Lars Heide. Early Punched Card Equipment: 1880-1951 [Scanning Our Past]. Proceedings of the IEEE, 101(2):546-552, 2013. [doi]
@article{PughH13,
title = {Early Punched Card Equipment: 1880-1951 [Scanning Our Past]},
author = {Emerson W. Pugh and Lars Heide},
year = {2013},
doi = {10.1109/JPROC.2012.2232513},
url = {http://dx.doi.org/10.1109/JPROC.2012.2232513},
researchr = {https://researchr.org/publication/PughH13},
cites = {0},
citedby = {0},
journal = {Proceedings of the IEEE},
volume = {101},
number = {2},
pages = {546-552},
}