TY  - RPRT
TI  - Photometry and colorimetry of retroreflection : State-of-measurement-accuracy report
AU  - Eckerle, Kenneth L
PY  - 1980
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 1125
DO  - 10.6028/NBS.TN.1125
ER  -