00389nam a2200121Ia 450000500170000000800410001702000220005805000140008010000170009424500820011126000290019365000450022220251229172037.0251229s9999    xx            000 0 und d  a978-0-85702-563-0  aH 62 .T46  aThomas, Gary 0aHow to do your case study ba guide for students and researcherscGary Thomas  aLos Angelesb Sagec2011  aSocial Sciences-- Research-- Methodology