Fifty-ton shipping cask built at Oak Ridge National Laboratory which can transport up to 1 gram of <sup>252</sup>Cf
Seaborg, G.T. (1994) <i><a rel="nofollow" class="external text" href="https://books.google.com/books?id=e53sNAOXrdMC&amp;pg=PA245">Modern alchemy: selected papers of Glenn T. Seaborg</a></i>, World Scientific, <a href="//commons.wikimedia.org/wiki/Special:BookSources/9810214405" title="Special:BookSources/9810214405">ISBN 9810214405</a>, p. 245
Unknown, US Department of Energy
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