Rural population density in the southern Appalachians.

"Literature cited": p. 18.

Population density relationships between hymenopterous parasites and their aphid hosts--a theoretical study

Includes bibliographical references.

2000 census population for Illinois : counties and incorporated places.

This report provides April 1, 2000 population counts for Illinois, counties and incorporated places, as well as some comparison data from earlier censuses. It also presents data on race and ethnicity, components of growth, historical population trends for the state and its counties. Census 2000 data for this report are from Summary File 1 and were downloaded from the Census Bureau's American FactFinder.

Measurement of subjective phenomena /

"Issued October 1981."