Witzel, D A Photosensitization in sheep fed Ammi majus (Bishop's weed) seed. [electronic resource] - American journal of veterinary research Feb 1978 - 319-20 p. digital Publication Type: Journal Article ISSN: 0002-9645 Subjects--Topical Terms: AnimalsFemalePhotosensitivity Disorders--etiologyPlant Poisoning--complicationsPlants, MedicinalSeedsSheepSheep Diseases--etiology