00304nam a2200109Ia 4500008004100000020001800041082001500059100001800074245003900092260005500131300000800186190710s9999    xx            000 0 und d  a0-8039-1633-7  a001.42 G46  aGlass, Gene V 0aMeta - analysis in social research  aCaliforniaba              Sage Publicationsc1981  a279