Columbia subject headings:
Agriculture--Missouri.
Geology--Missouri.
Mines and mineral resources--Missouri.
Pacific Railroad Company.
St. Louis and San Francisco Railroad Company.
Harvard subject headings:
Agriculture--Missouri
Geology--Missouri
Mines and mineral resources--Missouri
Pacific Railroad Company.
St. Louis-San Francisco Railway Company.
Princeton subject headings:
Agriculture--Missouri.
Geology--Missouri.
Mines and mineral resources--Missouri.
Pacific Railroad Company.
St. Louis and San Francisco Railroad Company.