<a href="https://en.wikipedia.org/wiki/Adolf_Harnack" class="extiw" title="en:Adolf Harnack">Adolf Harnack</a>
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<a href="https://en.wikipedia.org/wiki/Project_Gutenberg" class="extiw" title="en:Project Gutenberg">Project Gutenberg</a> eText 13635 - <a rel="nofollow" class="external free" href="http://www.gutenberg.net/dirs/1/3/6/3/13635/13635-h/13635-h.htm">http://www.gutenberg.net/dirs/1/3/6/3/13635/13635-h/13635-h.htm</a>