TY  - RPRT
TI  - Color differentiation by computer image processing
AU  - Billingsley, F. C.
AU  - Goetz, A. F. H.
AU  - Lindsley, J. N.
PY  - 1970
UR  - https://ntrs.nasa.gov/citations/19700056981
ID  - 19700056981
ER  -