PT  - JOURNAL ARTICLE
AU  - Williams, A L
AU  - Carrera, G F
AU  - Grogan, J P
AU  - Ullrich, D P
TI  - Vacuum phenomenon as a sign of an ununited, unstable dens fracture.
DP  - 1987 Nov 01
TA  - American Journal of Neuroradiology
PG  - 1144--1145
VI  - 8
IP  - 6
4099  - http://www.ajnr.org/content/8/6/1144.short
4100  - http://www.ajnr.org/content/8/6/1144.full
SO  - Am. J. Neuroradiol.1987 Nov 01; 8