TY  - BOOK
AU  - Burger, Robert G.
TI  - Key variables in social investigation / 
SN  - 0710206216
U1  - 301.072 301.072
PY  - 1986///
CY  - London : 
PB  - Routledge Kegan Paul , 
KW  - SOCIOLOGY-RESEARCH
N1  - NULL
ER  -