{"title":"[What are the causes of reduced fertility in human populations in former centuries?].","authors":"P Stephan","doi":"","DOIUrl":null,"url":null,"abstract":"","PeriodicalId":84273,"journal":{"name":"Biologisches Zentralblatt","volume":"106 1","pages":"21-32"},"PeriodicalIF":0.0000,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biologisches Zentralblatt","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}