TY - GEN AU - Robert E Berger AU - Nicholas J Calvano C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1978-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.78-1547 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1978 TI - Methodology for choosing test parameters to evaluate protective headgear: ER -