Graph showing the production of lumber by the Spruce Production Division from November 1917 to November 1918.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1">[1]</a></sup><h4><span class="mw-headline" id="Notes">Notes</span></h4>
<ol><li>This data does not add up to the total of 143,008,961 board feet, because it does not include the 1,679,123 board feet produced in September and October 1917 combined.</li>
<li>The lumber produced in November 1918 was not produced through the whole month, due to the end of World War I at that time.</li></ol><h4><span class="mw-headline" id="Sources">Sources</span></h4>
<div class="reflist" style="list-style-type: decimal;">
<ol class="references"><li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://books.google.com/ebooks/reader?id=eA1AAAAAYAAJ&amp;printsec=frontcover&amp;output=reader"><i>Oregon Voter</i> (3 April 1920)</a>. Portland, Oregon: Princeton University Archives. p. 107.</span>
</li>
</ol></div>
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