TY - GEN AU - W F Koch AU - G Marinenko AU - J W Stolz C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.82-2581 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - Simulated precipitation reference materials, IV: ER -