307.2
B637I
           Blalock, Hubert M
               Introduction to social research \ Hubert M Blalock - New Jersey : Prentice-Hall, 1970.
               119p. - Prentice-Hall general sociology series/ed. by Neil J Smelser .
                ISBN: 13-496828-X

71930
                Subjects: Social sciences-Research; Participant-Observation.