Columbia subject headings:
Metallurgical plants--Environmental aspects--Missouri River.
Metallurgical plants--Environmental aspects--Nebraska--Omaha.
Metals--Environmental aspects--Missouri River.
Metals--Environmental aspects--Nebraska--Omaha.
Water quality bioassay--Missouri River.
Water quality bioassay--Nebraska--Omaha.
Harvard subject headings:
Metallurgical plants--Environmental aspects--Missouri River.
Metallurgical plants--Environmental aspects--Nebraska--Omaha.
Metals--Environmental aspects--Missouri River.
Metals--Environmental aspects--Nebraska--Omaha.
Water quality bioassay--Missouri River.
Water quality bioassay--Nebraska--Omaha.
Princeton subject headings:
Metallurgical plants--Environmental aspects--Missouri River.
Metallurgical plants--Environmental aspects--Nebraska--Omaha.
Metals--Environmental aspects--Missouri River.
Metals--Environmental aspects--Nebraska--Omaha.
Water quality bioassay--Missouri River.
Water quality bioassay--Nebraska--Omaha.