TY - GEN AU - Clatworthy, W H AU - Connor, W S AU - Zelen, M C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1954-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.3481 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1954 TI - Some fractional factorial arrangements for factors at two levels: ER -