Columbia subject headings:
California--Commerce.
California--History.
Law--Political aspects--California.
Mines and mineral resources--California.
Pacific States--History.
Harvard subject headings:
Burnett, Peter H. (Peter Hardeman), 1807-1895
Business
California--History.
Law--Political aspects--California
Mines and mineral resources--California
Pacific States--History.
Pioneers--California.
Princeton subject headings:
California--History.
Pacific States--History.