00641nam a2200229Ia 4500 120305s9999 xx 000 0 und d 9781412960991 MUCST H62.Y5 2009 Yin,Robert K Case Study Research Design and Methods Robert K Yin 4th ed London Sage Publication,Inc 2009 xiv,219 Research methodology Social sciences 441 441 0 0 lcc 0 0 CPL CPL GEN 2011-12-23 0 H62.Y5 2009 11-2850 2011-12-23 00:00:00 2011-12-23 BK