RT Journal Article SR Electronic T1 A Comparative Study of the Pneumatization of the Mastoid Air Cells and the Frontal and Maxillary Sinuses JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP S88 OP S88 VO 10 IS 5 suppl A1 Anna Thomas A1 R. Raman YR 1989 UL http://www.ajnr.org/content/10/5_suppl/S88.abstract AB