title: Studies on the helminth parasites of the herring gull, Larus argentatus Pontopp., in Northern Caernarvonshire and Anglesey.
mesh_terms: D000818:Animals; D001715:Bird Diseases; D002590:Cestode Infections / Q000662:veterinary*; D005260:Female; D008297:Male; D009349:Nematode Infections / Q000662:veterinary*; D012621:Seasons; D014201:Trematode Infections / Q000662:veterinary*; D014852:Wales