Columbia subject headings:
Waterfowl management--Canada--Periodicals.
Waterfowl management--United States--Periodicals.
Waterfowl shooting--Canada--Periodicals.
Waterfowl shooting--United States--Periodicals.
Waterfowl--Canada--Periodicals.
Waterfowl--United States--Periodicals.
Harvard subject headings:
Waterfowl management--Canada--Periodicals.
Waterfowl management--United States--Periodicals.
Waterfowl shooting--Canada--Periodicals.
Waterfowl shooting--United States--Periodicals.
Waterfowl--Canada--Periodicals.
Waterfowl--United States--Periodicals.
Princeton subject headings:
Periodicals.
Waterfowl management--Canada--Periodicals.
Waterfowl management--United States--Periodicals.
Waterfowl shooting--Canada--Periodicals.
Waterfowl shooting--United States--Periodicals.
Waterfowl--Canada--Periodicals.
Waterfowl--United States--Periodicals.