TY  - RPRT
TI  - Considerations in developing test methods for protective headgear 
AU  - Berger, Robert E
PY  - 1976
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 76-1107
DO  - 10.6028/NBS.IR.76-1107
ER  -