"study number","owner","title","investigators","doi","time period"
"04343","ICPSR","Puerto Rico Census Project, 1910","Palloni, Alberto; Winsborough, Halliman H.; Scarano, Francisco","http://dx.doi.org/10.3886/ICPSR04343.v1","1910"
"04344","ICPSR","Puerto Rico Census Project, 1920","Palloni, Alberto; Winsborough, Halliman H.; Scarano, Francisco","http://dx.doi.org/10.3886/ICPSR04344.v1","1920"