The Principle of Acceleration: A Non-Dialectical Theory of Progress Folke Dovring In: "Comparative Studies in Society and History". Vol 11. Pp 413-425. 1969 2 substantive philosophy of history progress/decline
History as a social science: an essay on the nature and purpose of historical studies Folke Dovring 1960 1 theory and philosophy of historiography epistemology science (history and/as) sociology/social science