Harris, Errol E. Hypothesis and perception: the roots of scientific method / [b y] Errol E. Harris. - London: Allen and Unwin, 1970. - 3-395 p.: 3 plates, ill.; 23 cm. - Muirhead library of philosophy. . Includes bibliographical references. Subjects--Topical Terms: Science--Methodology.Hypothesis.Perception. Dewey Class. No.: 501