Columbia subject headings:
Harvard subject headings:
Bonhoeffer, Dietrich, 1906-1945
Bonhoeffer, Dietrich, 1906-1945--Criticism and interpretation.
Hillesum, Etty, 1914-1943--Criticism and interpretation.
Hillesum, Etty, 1914-1943.
Merton, Thomas, 1915-1968
Merton, Thomas, 1915-1968--Criticism and interpretation.
Purgative way to perfection.
Spirituality
Princeton subject headings:
Bonhoeffer, Dietrich, 1906-1945.
Contemplation.
Hillesum, Etty, 1914-1943.
Merton, Thomas, 1915-1968.
Purgative way to perfection.