TY - GEN AU - Fielding Ogburn C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1970-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.10270 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1970 TI - Measurement of thickness of chromium on currency printing plates ::technical report - January 1 to June 30, 1970 ER -