TY  - RPRT
TI  - Visual acuity testing of radiographic inspectors in nondestructive inspection 
AU  - Yonemura, Gary
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 1143
DO  - 10.6028/NBS.TN.1143
ER  -