"study number","owner","title","investigators","doi","time period"
"03487","ICPSR","Polish General Social Survey, 1992-1999","Cichomski, Bogdan; Jerzynski, Tomasz; Zielinski, Marcin","http://dx.doi.org/10.3886/ICPSR03487.v2","1999"
"20501","ICPSR","Polish General Social Survey, 1992-2002","Cichomski, Bogdan; Jerzynski, Tomasz; Zielinski, Marcin","http://dx.doi.org/10.3886/ICPSR20501.v1","2002"