TY  - RPRT
TI  - Preliminary report on the development of helicopter blade tip lights for formation flying 
AU  - Mullis, William F
AU  - Askew, Wade H
PY  - 1960
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS RPT 6835
DO  - 10.6028/NBS.RPT.6835
ER  -