principles and practices Gerring, John creator Verfasser aut text Second edition monographic xxix, 332 Seiten John Gerring (University of Texas at Austin) Fallstudie Qualitative Methode Quantitative Methode Empirische Sozialforschung Forschungsmethode Ms 978-1-107-18126-7 1-107-18126-7 20260731222813.0 0076393