RT Journal Article SR Electronic T1 Agenesis of the neural arch of the axis. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 75 OP 76 VO 3 IS 1 A1 Barber-Riley, W P YR 1982 UL http://www.ajnr.org/content/3/1/75.abstract AB