Johnson, A E Predisposing influence of range plants on Tetradymia-related photosensitization in sheep: work of Drs. A. B. Clawson and W. T. Huffman. [electronic resource] - American journal of veterinary research Dec 1974 - 1583-5 p. digital Publication Type: Biography; Historical Article; Journal Article ISSN: 0002-9645 Subjects--Topical Terms: AnimalsDesert ClimateHistory, 20th CenturyLiver Diseases--etiologyPhotosensitivity Disorders--etiologyPlant Poisoning--etiologySeasonsSheepSheep Diseases--etiologyUnited States