TY  - ELEC
A1  - Carter, S.B.
A1  - Gartner, S.S.
A1  - Haines, M.R.
A1  - Olmstead, A.L.
A1  - Sutch, R.
A1  - Wright, G.
T1  - Historical statistics of the United States: Millennial edition online 
Y1  - 2006
UR  - http://hsus.cambridge.org/HSUSWeb/HSUSEntryServlet
PB  - Cambridge University Press
CY  - Cambridge

ER  -