Biography
Efim Kertz is named in the September 1920 One Big Union Monthly among nineteen IWW members then held at Ellis Island, New York, awaiting deportation to Russia. Admission and ultimate deportation or release dates are not supplied. Source: https://www.marxists.org/history/usa/pubs/one-big-union-monthly/v02n09-sep-1920_One%20Big%20Union.pdf#page=59