1. American Society for Testing and Materials – ASTM (2003) G173-03: Standard Tables for Reference Solar Spectral Irradiances – Direct Normal and Hemispherical on 37° Tilted Surface, Philadelphia
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3. American Society for Testing and Materials – ASTM (2021) E1918-21: Standard Test Method for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the Field. Philadelphia
4. American Society for Testing and Materials – ASTM (2020) E903-20: Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Sphere. Philadelphia
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