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Scan of the title page from Mildred Catherine Benton, <i>The Clock Problem (Clock Paradox) in Relativity - Theories, Both Pro and Con, Recorded in the Literature - An Annotated Bibliography</i>, U. S. Naval Research Laboratory, Washington, D. C. 1959, Bibliography No. 15, <a href="https://en.wikipedia.org/wiki/en:technical_report" class="extiw" title="w:en:technical report">technical report</a> no. PB-151671 (not verified), v+48 pages, <a href="https://en.wikipedia.org/wiki/en:Amazon_Standard_Identification_Number" class="extiw" title="w:en:Amazon Standard Identification Number">ASIN</a> B0007FCLFU, OCLC <a rel="nofollow" class="external text" href="http://www.worldcat.org/oclc/317335273">317335273</a> &amp; <a rel="nofollow" class="external text" href="http://www.worldcat.org/oclc/7488647">7488647</a></div>
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Mildred Catherine Benton</div>
300 dpi scan of what looks like a bound photocopy from the Danish national library.