<a href="https://en.wikipedia.org/wiki/Marie_Curie" id="mwrg" rel="mw:WikiLink" title="Marie Curie">Marie</a> and <a href="https://en.wikipedia.org/wiki/Pierre_Curie" id="mwrw" rel="mw:WikiLink" title="Pierre Curie">Pierre Curie</a> announce the isolation of <a href="https://en.wikipedia.org/wiki/Radium" id="mwsA" rel="mw:WikiLink" title="Radium">radium</a>.<sup about="#mwt109" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-20"}}' id="cite_ref-20" rel="dc:references" typeof="mw:Extension/ref"><a href="./December_26#cite_note-20" id="mwsQ" style="counter-reset: mw-Ref 20;"><span class="mw-reflink-text" id="mwsg">[20]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-20"><cite about="#mwt106" class="citation book cs1" id="CITEREFStrikmanSpartalianCole2015">Strikman, Mark; Spartalian, Kevork; Cole, Milton (2015). <a class="external text" href="https://books.google.com/books?id=FFgiBQAAQBAJ" id="mwB3w" rel="mw:ExtLink nofollow"><i id="mwB30">Applications of Modern Physics in Medicine</i></a>. Princeton, N.J.: Princeton University Press. p.<span id="mwB34" typeof="mw:Entity"> </span>68. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwB38" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwB4A" typeof="mw:Entity"> </span><a href="./Special:BookSources/9780691125862" id="mwB4E" rel="mw:WikiLink" title="Special:BookSources/9780691125862"><bdi id="mwB4I">9780691125862</bdi></a>.</cite><span about="#mwt106" class="Z3988" id="mwB4M" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Applications+of+Modern+Physics+in+Medicine&amp;rft.place=Princeton%2C+N.J.&amp;rft.pages=68&amp;rft.pub=Princeton+University+Press&amp;rft.date=2015&amp;rft.isbn=9780691125862&amp;rft.aulast=Strikman&amp;rft.aufirst=Mark&amp;rft.au=Spartalian%2C+Kevork&amp;rft.au=Cole%2C+Milton&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DFFgiBQAAQBAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3ADecember+26"></span></span>