"study number","owner","title","investigators","doi","time period"
"22100","NACDA","Longitudinal Study of Generations, 1971, 1985, 1988, 1991, 1994, 1997, 2000 [California]","Bengtson, Vern L.","http://dx.doi.org/10.3886/ICPSR22100.v2",""
"04076","NACDA","Longitudinal Study of Generations, 1971, 1985, 1988, 1991, 1994, 1997: [California]","Bengtson, Vern L.","http://dx.doi.org/10.3886/ICPSR04076.v1",""