ckage, preparing data on disparate geographies for comparison by converting them to a common geography is as easy as typing <code>tongfen</code>.</p>
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<h3 id="reference">Reference<a class="anchor" aria-label="anchor" href="#reference"></a>
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<p><a href="https://mountainmath.github.io/tongfen/"><strong>TongFen home page and reference guide</strong></a></p>
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<h3 id="installing-the-package">Installing the package<a class="anchor" aria-label="an