title: RESEARCH INTO THE LIFE HISTORY OF PHILOPHTHALMUS SP., RECOVERED FROM GEESE IN BULGARIA. I.
mesh_terms: D000818:Animals; D001715:Bird Diseases; D002031:Bulgaria; D005777:Geese; D006801:Humans; D008018:Life Cycle Stages; D012908:Snails; D014200:Trematoda
keywords: BIRD DISEASES; BULGARIA; SNAILS; TREMATODA