TY - RPRT TI - An automated maintenance management program : part I : quantitative assessment of the exterior condition of metal buildings and roofing systems via computer image processing AU - Martin, Jonathan W AU - Bentz, Dale P AU - Kaetzel, Lawrence AU - McKnight, Mary E PY - 1988 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 88-3719 DO - 10.6028/NBS.IR.88-3719 ER -