B797.  The Evolution of the Samurai Helmet by Louis and Kei Kaneda Chappelear.  1978.  22 unbound pages.  Near as I can figure this is the way the article was originally published, as loose sheets released by The Northern California Japanese Sword Club.  I know klittle about armor or kabuto but this seems to be well done.  Condition is fine. 3 ounces.  $15.