Columbia subject headings:
Harvard subject headings:
American bison--Diseases--Yellowstone National Park.
Brucellosis in animals--Yellowstone National Park--Prevention.
National parks and reserves--Law and legislation--United States
Wild horses--Law and legislation--Missouri--Ozark National Scenic Riverways.
Princeton subject headings:
American bison--Diseases--Yellowstone National Park.
Brucellosis in animals--Yellowstone National Park--Prevention.
National parks and reserves--Law and legislation--United States.
Wild horses--Law and legislation--Missouri--Ozark National Scenic Riverways.