TY - BOOK AU - Gerring,John TI - Case study research: principles and practices T2 - Strategies for social inquiry SN - 978-1-107-18126-7 PY - 2017/// CY - Cambridge PB - Cambridge University Press KW - Fallstudie KW - Qualitative Methode KW - Quantitative Methode KW - Empirische Sozialforschung KW - Forschungsmethode ER -