Haarmann, Hermann (Ed.) and Christoph Hesse (Ed.). Briefe an Bertolt Brecht im Exil (1933-1949). Berlin, Boston: De Gruyter, 2014. Web. Retrieved 24 May. 2013, from http://www.degruyter.com/view/product/22749

Haarmann, H. (Ed.) & Hesse, C. (Ed.) (2014). Briefe an Bertolt Brecht im Exil (1933-1949). Berlin, Boston: De Gruyter. Retrieved 24 May. 2013, from http://www.degruyter.com/view/product/22749

Haarmann, Hermann (Ed.) and Christoph Hesse (Ed.). 2014. Briefe an Bertolt Brecht im Exil (1933-1949). Berlin, Boston: De Gruyter. Retrieved 24 May. 2013, from http://www.degruyter.com/view/product/22749