1. Lesions of the ocular fundus associated with systemic disease;Albert;Journal of the American Veterinary Medical Association,1970
2. Recognizing ocular signs of systemic diseases in dogs;Johnson;Veterinary Medicine,1990
3. Ocular signs of systemic diseases;Martin;Modern Veterinary Practice,1982
4. An outbreak of the conjunctival form of infectious bovine rhinotracheitis;Rebhun;The Cornell Veterinarian,1978