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Par Collection Par Auteur- XIANG YUEQIN (1)
- ZHOU YUNHUA (1)
- 1994 (1)
- According to 2698 sets of observation data on solar direct radiation in sub-divisions of wave band at 10 spots of seven regions in China, the empirical formula and nomograph for estimating ultraviolet irradiance at wavelength λ < 400 nm were