Columbia subject headings:
Gregg, Josiah, 1806-1850.
Gregg, Josiah, 1806-1850. Scenes and incidents in the Western praries.
Mexico--Description and travel.
Pioneers--Southwest, New--Biography.
Southwest, New--Description and travel.
Harvard subject headings:
Gregg, Josiah, 1806-1850.
Gregg, Josiah, 1806-1850. Commerce of the prairies.
Mexico--Description and travel.
Pioneers--Southwest, New--Biography
Southwest, New--Description and travel.
Princeton subject headings:
Gregg, Josiah, 1806-1850.
Gregg, Josiah, 1806-1850. Commerce of the prairies.
Mexico--Description and travel.
Pioneers--Southwest, New--Biography.
Southwest, New--Description and travel.