TY - JOUR T1 - Preservation of Knowledge, Part 1: Paper and Microfilm JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1627 LP - 1628 DO - 10.3174/ajnr.A1655 VL - 30 IS - 9 AU - M. Castillo Y1 - 2009/10/01 UR - http://www.ajnr.org/content/30/9/1627.abstract N2 - ER -