Columbia subject headings:
Geographers--United States--Biography.
Shaler, Nathaniel Southgate, 1841-1906.
Harvard subject headings:
Geographers--United States--Biography.
McKay, Gordon, 1821-1903.
Shaler, Nathaniel Southgate, 1841-1906
Princeton subject headings:
Geographers--United States--Biography.
Shaler, Nathaniel Southgate, 1841-1906.