A alternate form of the "UNCOL diagram"

Harvey Bratman
<span title="1961-03-01">1961</span> <i title="Association for Computing Machinery (ACM)"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/i6iajiiyxvgz3ob6jwcn2pufni" style="color: black;">Communications of the ACM</a> </i> &nbsp;
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="https://doi.org/10.1145/366199.366249">doi:10.1145/366199.366249</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/2cbppffwqzby7l2n27hmsecssm">fatcat:2cbppffwqzby7l2n27hmsecssm</a> </span>
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