{"title":"[Development and purpose of professional associations].","authors":"H J Berden","doi":"","DOIUrl":null,"url":null,"abstract":"","PeriodicalId":78232,"journal":{"name":"Die Sonde","volume":"8 1","pages":"8-9"},"PeriodicalIF":0.0000,"publicationDate":"1968-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Die Sonde","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}