TY  - RPRT
TI  - The assessment of safety symbol understandability by different testing methods 
AU  - Lerner, Neil D
AU  - Collins, Belinda L
PY  - 1980
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 80-2088
DO  - 10.6028/NBS.IR.80-2088
ER  -