1. Clinical Radiology of the Horse;Butler,1992
2. Techniques of Veterinary Radiography;Morgan,1987
3. A standardized nomenclature for radiographic projections used in veterinary medicine;Smallwood;Vet Radiol,1985
4. Textbook of Veterinary Diagnostic Radiology;Thrall,1986
5. Radiographic Technique in Veterinary Practice ed 2;Ticer,1984