@Book{124976719,
author="Blume, Helmut",
title="USA: eine geographische Landeskunde",
series="Wissenschaftliche L{\"a}nderkunden",
year="1975",
publisher="Wiss. Buchges.",
address="Darmstadt",
keywords="Economic geography; Cities and towns; United States; Natural resources; Landeskunde; Economic conditions; Population; USA",
note="von Helmut Blume",
language="German"
}