Whitehead, Alfred North, 1861-1947. An enquiry concerning the principles of natural knowledge / by A.N. Whitehead ... - Cambridge : University Press, 1919 [Reprinted 1955] - xiv, 207 p. diagrs. 23 cm. Subjects--Topical Terms: Science--Philosophy.Knowledge, Theory of. Dewey Class. No.: 501 / WHE 1955