John Holt's
... that for security reasons, the findings relating to uranium in John Holt's 1941 PhD thesis on artificial radioactivity were not released?
... that for security reasons, the findings relating to <a href="./Uranium" id="mwEMI" rel="mw:WikiLink" title="Uranium">uranium</a> in <b id="mwEMM"><a class="mw-redirect" href="./John_Holt_(physicist)" id="mwEMQ" rel="mw:WikiLink" title="John Holt (physicist)">John Holt's</a></b> 1941 <a href="./Doctor_of_Philosophy" id="mwEMU" rel="mw:WikiLink" title="Doctor of Philosophy">PhD</a> thesis on <a href="./Induced_radioactivity" id="mwEMY" rel="mw:WikiLink" title="Induced radioactivity">artificial radioactivity</a> were not released?