Edward Playfair. Computers and psychology. Comput. J., 7(1):1-3, 1964. [doi]
@article{Playfair64, title = {Computers and psychology}, author = {Edward Playfair}, year = {1964}, doi = {10.1093/comjnl/7.1.1}, url = {https://doi.org/10.1093/comjnl/7.1.1}, researchr = {https://researchr.org/publication/Playfair64}, cites = {0}, citedby = {0}, journal = {Comput. J.}, volume = {7}, number = {1}, pages = {1-3}, }