1. Occult spinal dysraphism: a series of 73 cases;M, Anderson F.;Pediatrics,1975
2. Agenesis of the sacrum;I, Williams D.; H, Nixon H.;Sirg Gynecol Obstet,1957
3. Sacral agenesis-analysis of 22 cases;I, White R.; T, Klauber G.;Urology,1976
4. Correlative studies of bladder function in myelomeningocele;D, Stark G.;Dev Med Child Neurol [Suppl],1973