TY - GEN AU - Clifford H Spiegelman C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1981-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.81-2222 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1981 TI - Some conservative statistical approaches for presenting interlaboratory N.D.A. enrichment measurements: ER -