. . "This material has been digitised. Readers should book a reading room terminal to access it."@en . "WL3000/9/1/577" . . . . "Correspondence regarding Heimberg's involvement with the Freiwirtschaftsbewegung."@en . "Correspondence with Heimberg, Bertha"@en . . "2 items"@en . . . . "Bertha Heimberg (1894-1966) was a German economist, trade unionist, and Nazi opponent."@en .