TY  - BOOK
AU  - King, Gary.
AU  - Keohane, Robert O.
AU  - Verba, Sidney.
TI  - Designing Social Inquiry : : Scientific Inference in Qualitative Research / 
SN  - 9780691224626
U1  - 300.72 
PY  - 2021///
CY  - New Jersy : 
PB  - Princeton University Press, 
ER  -