TY  - BOOK
AU  - Gerring, John
TI  - Social science methodology : a unified framework
SN  - 978-0-521-13277-0
U1  - 300.72 23rd.
PY  - 2012///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Social sciences-Methodology
UR  - www.cambridge.org
ER  -