Coccygeal ribs: development and appearance in two cases.

[1]  W. S. Cornwell,et al.  Pelvic rib. Report of a case. , 1974, Radiology.

[2]  C. Freed Intrathoracic rib: a case report. , 1972, South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde.

[3]  W. Whitehouse,et al.  Supernumerary thoracic ribs. , 1969, Radiology.

[4]  E. C. Sensenig The early development of the human vertebral column. , 1949, Contributions to embryology.

[5]  W. Halloran Report of sacral ribs. , 1960, Quarterly bulletin. Northwestern University (Evanston, Ill.). Medical School.