TY  - BOOK
AU  - Blalock, Hubert M
TI  - Introduction to social research
SN  - 13-496828-X
U1  - 307.2 21st
PY  - 1970///
CY  - New Jersey
PB  - Prentice-Hall
KW  - Social sciences-Research; Participant-Observation
ER  -