The 1980 U.S. Census Undercount
Ericksen data frame has 66 rows and 9 columns.
The observations are 16 large cities, the remaining parts of
the states in which these cities are located, and the other
U. S. states.
Ericksen, E. P., Kadane, J. B. and Tukey, J. W. (1989) Adjusting the 1980 Census of Population and Housing. Journal of the American Statistical Association 84, 927--944 [Tables 7 and 8].
Fox, J. (2008) Applied Regression Analysis and Generalized Linear Models, Second Edition. Sage. Fox, J. and Weisberg, S. (2011) An R Companion to Applied Regression, Second Edition, Sage.