TY  - RPRT
TI  - A preliminary investigation of enhancement techniques using infrared ektachrome processed as a negative and a positve
AU  - J. Ronald Eyton
PY  - 1971
DO  - 10.3133/ofr7199
UR  - https://pubs.usgs.gov/publication/ofr7199
ID  - ofr7199
ER  -