Armstrong, D. M. 1926- Perception and the physical world / by D.M. Armstrong. - London : Routledge & Kegan Paul, 1961 [Reprinted 1973] - xii, 196 p. ; 23 cm. - International library of philosophy and scientific method . Includes bibliographical footnotes and index. ISBN: 0710036035 Subjects--Topical Terms: Knowledge, Theory of.Perception. Dewey Class. No.: 152 / ARP 1973