@article{McBeth_1963,
    doi = {10.1145/367593.367649},
    url = {https://doi.org/10.1145%2F367593.367649},
    year = {1963},
    month = {sep},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {6},
    number = {9},
    pages = {575},
    author = {J. Harold McBeth},
    title = {Letters to the editor},
    journal = {Communications of the {ACM}}
}

@article{McBeth_1963, doi = {10.1145/367593.367649}, url = {https://doi.org/10.1145%2F367593.367649}, year = {1963}, month = {sep}, publisher = {Association for Computing Machinery ({ACM})}, volume = {6}, number = {9}, pages = {575}, author = {J. Harold McBeth}, title = {Letters to the editor}, journal = {Communications of the {ACM}} }