TY  - RPRT
TI  - Methodology for choosing test parameters to evaluate protective headgear 
AU  - Berger, Robert E
AU  - Calvano, Nicholas J
PY  - 1978
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 78-1547
DO  - 10.6028/NBS.IR.78-1547
ER  -