Shows the index of population resources development, a combination of statistics relating to population density, literacy, non-agricultural workers, and urban population. Includes index.
Series:
Special map series ; Plate no. 20
OCLC:
(OCoLC)54000410
LCCN:
2002296504
Locations:
OVUX522 -- University of Iowa Libraries (Iowa City)
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.