Observations on some helminth parasites from ducks in Southern England.
D000818:Animals; D001717:Birds; D004194:Disease; D004372:Ducks; D004739:England; D006373:Helminthiasis / Q000453:epidemiology*; D006376:Helminths; D010271:Parasites; D011200:Poultry
FOWLS, DOMESTIC/diseases; HELMINTH INFECTIONS/epidemiology