- Bonhoeffer, Dietrich 1906-1945 gnd1
- Bonhoeffer, Dietrich, 1906-19451
- Bonhoeffer, Dietrich, 1906-1945 Correspondence1
- Bonhoeffer, Dietrich, 1906-1945 Correspondence. nli1
- Bonhoeffer, Dietrich. swd1
- Niemöller, Martin, 1892-19841
- Niemöller, Martin, 1892-19841