Columbia subject headings:
Biserica Ortodoxă Română--Biography.
Christianity--Philosophy.
Dumitriu, Petru.
Harvard subject headings:
Belief and doubt.
Biserica Ortodoxă Română--Biography.
Christianity--Philosophy
Dumitriu, Petru.
God--Knowableness
Hidden God.
Natural theology.
Religion and science
Religion--Philosophy
Spiritual biography.
Theodicy.
Princeton subject headings:
Biserica Ortodoxă Română--Biography.
Christianity--Philosophy.
Dumitriu, Petru.