(1953). Portfolio of United States census maps: A selection of maps used in the publications of the 1950 censuses of population and agriculture. U.S. Gov. Pr. Off.
Chicago-Zitierstil (17. Ausg.)Portfolio of United States Census Maps: A Selection of Maps Used in the Publications of the 1950 Censuses of Population and Agriculture. Washington: U.S. Gov. Pr. Off, 1953.
MLA-Zitierstil (9. Ausg.)Portfolio of United States Census Maps: A Selection of Maps Used in the Publications of the 1950 Censuses of Population and Agriculture. U.S. Gov. Pr. Off, 1953.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.