(saa1/saa_100k/)
 
census/        US Census Block Groups and STF3A data
 
     readme/        Directory Information
     metadata/      Metadata
     info/          INFO data base
 
     al_90bg        Alabama 1990 Block Groups and STF3A
     ga_90bg        Georgia 1990 Block Groups and STF3A
     nc_90bg        North Carolina 1990 Block Groups and STF3A
     sc_90bg        South Carolina 1990 Block Groups and STF3A
     tn_90bg        Tennessee 1990 Block Groups and STF3A
     va_90bg        Virginia 1990 Block Groups and STF3A
     wv_90bg        West Virginia 1990 Block Groups and STF3A