Harris, Errol E. Hypothesis and perception: the roots of scientific method [by] Errol E. Harris. - London, New York, Allen & Unwin; Humanities Press, 1970. - 3-395 p., 3 plates. illus. 23 cm. - Muirhead library of philosophy . - Library of philosophy. . Includes bibliographical references. Source: �?�?�5.00 LCCN: 71563590 Nat. Bib. No.: B71-02893 Subjects--Topical Terms: Science--Methodology.Hypothesis.Perception. LC Class. No.: Q175 / .H3277 Dewey Class. No.: 501