William Whewell's theory of scientific method. Edited with an introduction by Robert E. Butts. - Pittsburgh University of Pittsburgh Press [c1968] - ix, 358 p. 24 cm. Includes bibliographical references. LCCN: 68023166 Subjects--Topical Terms: Science--Philosophy.Science--Methodology. LC Class. No.: Q175 / .W567 1968 Dewey Class. No.: 501