TY - RPRT TI - STEP file analyzer and viewer user guide (Update 6) AU - Lipman, Robert R AU - Kwon, Soonjo PY - 2020 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NIST AMS 200-10 DO - 10.6028/NIST.AMS.200-10 ER -