We now look at the controversies over discovery and rights to naming elements 104 to 109 in the 1960s to 1990s. The various laboratories included University of California--Berkeley, JINR at Dubna, and GSI Helmholtz Centre for Heavy Ion Research in Darmstadt. There were arguments and spats over who discovered what, and what constitutes discovery. Eventually a Transfermium Working Group of the International Union of Pure and Applied Chemistry, along with the International Union of Pure and Applied Physics, came to referee the battle--and even that caused more problems.Support the show Support my podcast at https://www.patreon.com/thehistoryofchemistry Tell me how your life relates to chemistry! E-mail me at steve@historyofchem.com Get my book, O Mg! How Chemistry Came to Be, from World Scientific Publishing, https://www.worldscientific.com/worldscibooks/10.1142/12670#t=aboutBook