Hyostrongylus rubidus: the size and structure of worm populations in adult pigs.
D000818:Animals; D004739:England; D007814:Larva; D012621:Seasons; D012737:Sex Factors; D013270:Stomach; D013552:Swine; D013553:Swine Diseases; D014251:Trichostrongyloidea / Q000302:isolation & purification*; D014252:Trichostrongyloidiasis / Q000662:veterinary