TY  - BOOK
AU  - Webb,Eugene J.
TI  - Nonreactive measures in the social sciences
SN  - 0395307678 (pbk.)
AV  - H62 .N675 1981
U1  - 300/.72 2nd
PY  - 1981///
CY  - Boston
PB  - Houghton Mifflin
KW  - Social sciences
KW  - Research
N1  - Previous ed.: Unobtrusive measures. 1966; Includes index; Bibliography: p. 331-378
ER  -