TY  - RPRT
TI  - Test patterns NBS-28 and NBS-28A 
AU  - Mitchell, Michael A
AU  - Linholm, Loren W
PY  - 1981
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS SP 400-65
DO  - 10.6028/NBS.SP.400-65
ER  -