Introduction to the philosophy of science : a text / by members of the Department of the History and Philosophy of Science of the University of Pittsburgh ; Merrilee H. Salmon ... [et al.]. Salmon, Merrilee H. University of Pittsburgh. Department of the History and Philosophy of Science. Science Philosophy. Q175 .I633 1992 501 20 INT Includes bibliographical references (p. 426-446) and index. Englewood Cliffs, N.J. : Prentice Hall, c1992. c1992. 1992 Text vi, 458 p. : eng