Ferguson Sherry Devereaux Researching the public opinion environment theories and methods - London Sage Publications 2000 - vii, 296p. cm. - Sage series in public relations . ISBN: 0761915311 (pbk) Standard No.: 170,901 Source: Textual Subjects--Topical Terms: ENGINEERING Dewey Class. No.: D65,8(B44),1, P0