//-->
Banking functions as an index of inter-city relations
Lieberson, Stanley, (1962)
Analysis of seven decisions to locate industry in rural areas of Iowa
Harmel jr., Robert Mitchell, (1974)
Spatial pattern of grocery purchases by the Iowa rural population
Rushton, Gerard, (1966)
The factors contributing to industrial outmigration from rural areas of Iowa
Barkley, David Lane, (1976)