ultraviolet light studies, 1999-01 - 2000-01-03raking light studies, 1999-01 - 2000-01-03stereomicroscopy, 1999-01 - 2000-01support analyses: canvas, 1999 - 2001infrared reflectography, 2001 - 2002SEM-EDX, 1998-10-07 - 1999-11-26not specified, 1999-01 - 2000-01x-radiography, 1993 - 1993normal light studies, 1999-01 - 2000-01