1. Tumors of the nervous system;Pack,1959
2. Tumors of the soft somatic tissues and bone;Pack,1964
3. Primary tumors of the retroperitoneum: clinicopathologic analysis of 162 cases; review of literature and tables of classification;Melicow;J. Int. Coll. Surg.,1953
4. Collective review; primary retroperitoneal tumors; study of 120 cases;Pack;Int. Abstr. Surg.,1954
5. Abdominal neoplasms of neurogenic origin;Ransom;Ann. Surg.,1940