TY - BOOK AU - Gerring,John TI - Social science methodology : a unified framework T2 - Strategies for social inquiry SN - 9780521132770 AV - H61 .G466 2012 U1 - 300.72 22 PY - 2012/// CY - Cambridge PB - Cambridge University Press KW - Social sciences KW - Methodology N1 - Previous ed.: 2001; Includes bibliographical references (p. 444-491) and index ER -