TY  - BOOK
AU  - Sjoberg,Gideon
AU  - Nett,Roger
TI  - A methodology for social research
U1  - 300.72 21
PY  - 1968///]
CY  - New York
PB  - Harper & Row
KW  - Social sciences
KW  - Research
N1  - Bibliographical footnotes; المحتويات :
ER  -