Helfet Arthur J., Lee David M. Gruebel Disorders of the lumbar spine - - Philadelphia J. B. Lippincott 1978 - 262 p. 26 cm. - . Lumbar Vertebrae, Spinal Diseases ISBN: 0397503814 Subjects--Topical Terms: Spinal DiseasesLumbar Vertebrae Dewey Class. No.: WE725 / HEL