References
- Atlanta Center for Disease Control. Congenital Malformations Surveillance. November-December, 1972, issued February 1973
- Bheattay E., Nelson M. M., Beighton P. Epidemic of conjoined twins in southern Africa?. Lancet 1975; ii: 741
- Hanson J. W. Incidence of conjoined twinning. Lancet 1975; ii: 1257
- Kalian B., Winberg J. A Swedish register of congenital malformations. Experience with continuous registration during 2 years with special reference to multiple malformations. Pediatrics 1968; 41: 765
- Milham S., Jr. Symmetrical conjoined twins: an analysis of the birth records of twenty-two sets. J Pediat 1966; 69: 643
- Potter E. L. Pathology of the Fetus and Infant. Yearbook Medical Publishers, Inc., Chicago 1961; 217
- Rudolph A. J., Michaels J. P., Nichols B. L. Obstetric management of conjoined twins. Birth Defects Original Article Series 1967; 3: 28