TY - GEN AU - Henry V Opperman C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1980-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.80-2179 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1980 TI - Type approval criteria and test procedures ::prepared for the Task Force on National Type Approval of the National Conference on Weights and Measures ER -