Denzin, Norman K. The research act : a theoretical introduction to sociological methods / [by] Norman K. Denzin. - Chicago, Aldine Pub. Co. [1970] - xiii, 368 p. 25 cm. - Methodological perspectives . Bibliography: p. [345]-360. LCCN: 70102761 Subjects--Topical Terms: Sociology--Methodology.Sociology--Research. Dewey Class. No.: 301.072 / DER 1970