APA Citation

Hornberger, M. A. (1974). The spatial distribution of ethnic groups in selected counties in Pennsylvania 1800-1880: A geographic interpretation.

Chicago Style Citation

Hornberger, Mark Allen. The Spatial Distribution of Ethnic Groups in Selected Counties in Pennsylvania 1800-1880: A Geographic Interpretation. 1974.

MLA Citation

Hornberger, Mark Allen. The Spatial Distribution of Ethnic Groups in Selected Counties in Pennsylvania 1800-1880: A Geographic Interpretation. 1974.

Warning: These citations may not always be 100% accurate.