TY  - RPRT
A1  - Ruggles, S.
A1  - Sobek, M.
A1  - Alexander, T.
A1  - Fitch, C.A.
A1  - Goeken, R.
A1  - Hall, P.K.
A1  - King, M.
A1  - Ronnander, C.
T1  - Integrated Public Use Microdata Series: Version 4.0 [Machine-readable database]
Y1  - 2008
PB  - Minnesota Population Center

ER  -