Simon, Julian Lincoln, 1932-1998. Basic research methods in social sciences : the art of empirical investigation / Julian L. Simon. - 2d ed. - New York : Random House, 1978. - xviii, 558 p. : graphs ; 25 cm. Includes index. ISBN: 0394320492 LCCN: 77017286 LC Class. No.: H62 .S475 1978 / .S475 1978 Dewey Class. No.: 300/.72