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Contributors to Discoveries of the Actinide Series
This page provides information about Stanley G. Thompson and Glenn T. Seaborg, both of whom contributed to the discovery of berkelium and californium of the actinide series. Very comprehensive site.
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Lanl: The Actinide Research Quarterly
This is "The Actinide Research Quarterly", a publication about current research of the actinide metals and nuclear materials technology by Los Alamos National Laboratory. Very detailed information.