2.
Degenerative Spinal Deformity: Creating Lordosis in the Lumbar Spine, an Issue of Neurosurge...
by Berven, Sigurd H., Mummanen...
ISBN: 9780323641074
List Price: $138.99
3.
Spinal Deformity Update, an Issue of Neurosurgery Clinics of North America: Volume 34-4
by Berven, Sigurd H., Mummanen...
ISBN: 9780443182501