TY  - RPRT
TI  - New approaches to the geography of the United States: Introduction
AU  - Arch C. Gerlach
PY  - 1964
DO  - 10.1111/j.1467-8306.1964.tb00468.x
UR  - https://pubs.usgs.gov/publication/70221129
ID  - 70221129
ER  -