Scan from the book <i>Sexual Education of the Young Woman</i> from Dr. David H. Keller (2160 H1)
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<a href="https://en.wikipedia.org/wiki/en:David_H._Keller" class="extiw" title="w:en:David H. Keller">Dr. David H. Keller</a> (1880-1966)</div>
<bdi><a href="https://www.wikidata.org/wiki/Q15734302" class="extiw" title="d:Q15734302"><span title="university library">Maastricht University Library</span></a>
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