Becker, Ernst Wolfgang (Ed.), Martin Vogt (Ed.), Wolfram Werner (Ed.), et al. Der Bundespräsident. Briefe 1954-1959. Berlin, Boston: De Gruyter, 2013. Web. Retrieved 18 May. 2013, from http://www.degruyter.com/view/product/39786

Becker, E. (Ed.), Vogt, M. (Ed.), Werner, W. (Ed.), et al. (2013). Der Bundespräsident. Briefe 1954-1959. Berlin, Boston: De Gruyter. Retrieved 18 May. 2013, from http://www.degruyter.com/view/product/39786

Becker, Ernst Wolfgang (Ed.), Martin Vogt (Ed.), Wolfram Werner (Ed.), et al. 2013. Der Bundespräsident. Briefe 1954-1959. Berlin, Boston: De Gruyter. Retrieved 18 May. 2013, from http://www.degruyter.com/view/product/39786