TY  - RPRT
TI  - Sky type discrimination using a ground-based sun photometer
AU  - Thomas P. DeFelice
AU  - Bruce K. Wylie
PY  - 2001
DO  - 10.1016/s0169-8095(01)00122-3
UR  - https://pubs.usgs.gov/publication/70155995
ID  - 70155995
ER  -