"History and Judgment: Butterfield, Niebuhr and the Technical Historian", The Frontier: A Christian Commentary on the Common Life, 1:8 (August 1950), pp.
"History and Judgment: Butterfield, Niebuhr and the Technical Historian", The Frontier: A Christian Commentary on the Common Life, 1:8 (August 1950), pp. - This reference is likely about how historians analyze historical events from a Christian perspective.