TY  - RPRT
TI  - Ultraviolet absorption and luminescence studies: Progress report for the period from April to December, 1967
AU  - W. R. Hemphill
PY  - 1968
DO  - 10.3133/ofr68127
UR  - https://pubs.usgs.gov/publication/ofr68127
ID  - ofr68127
ER  -